# # GENERATED WITH PDL::PP! Don't modify! # package PDL::IO::Misc; our @EXPORT_OK = qw( rcols wcols swcols rgrep rdsa PDL::PP bswap2 PDL::PP bswap4 PDL::PP bswap8 isbigendian rasc rcube PDL::PP _rasc ); our %EXPORT_TAGS = (Func=>[@EXPORT_OK]); use PDL::Core; use PDL::Exporter; use DynaLoader; our @ISA = ( 'PDL::Exporter','DynaLoader' ); push @PDL::Core::PP, __PACKAGE__; bootstrap PDL::IO::Misc ; =head1 NAME PDL::IO::Misc - misc IO routines for PDL =head1 DESCRIPTION Some basic I/O functionality: FITS, tables, byte-swapping =head1 SYNOPSIS use PDL::IO::Misc; =cut =head1 FUNCTIONS =cut use PDL::Primitive; use PDL::Types; use PDL::Options; use PDL::Bad; use Carp; use Symbol qw/ gensym /; use List::Util; use strict; =head2 bswap2 =for sig Signature: (x(); ) =for ref Swaps pairs of bytes in argument x() =for bad bswap2 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles. =cut *bswap2 = \&PDL::bswap2; =head2 bswap4 =for sig Signature: (x(); ) =for ref Swaps quads of bytes in argument x() =for bad bswap4 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles. =cut *bswap4 = \&PDL::bswap4; =head2 bswap8 =for sig Signature: (x(); ) =for ref Swaps octets of bytes in argument x() =for bad bswap8 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles. =cut *bswap8 = \&PDL::bswap8; # Internal routine to extend PDL array by size $n along last dimension # - Would be nice to have a proper extend function rather than hack # - Is a NO-OP when handed a perl ARRAY ref rather than a piddle arg sub _ext_lastD { # Called by rcols and rgrep my ($x,$n) = @_; if (ref($_[0]) ne 'ARRAY') { my @nold = $x->dims; my @nnew = @nold; $nnew[-1] += $n; # add $n to the last dimension my $y = zeroes($x->type,@nnew); # New pdl my $yy = $y->mv(-1,0)->slice("0:".($nold[-1]-1))->mv(0,-1); $yy .= $x; $_[0] = $y; } 1; } # Implements PDL->at() for either 1D PDL or ARRAY arguments # TODO: Need to add support for multidim piddles parallel to rcols sub _at_1D ($$) { # Called by wcols and swcols my $data = $_[0]; my $index = $_[1]; if (ref $data eq 'ARRAY') { return $data->[$index]; } else { return $data->at($index); } } # squeezes "fluffy" perl list values into column data type sub _burp_1D { my $data = $_[0]->[0]; my $databox = $_[0]->[1]; my $index = $_[1]; my $start = $index - @{$databox} + 1; my $tmp; # work around for perl -d "feature" if (ref $data eq 'ARRAY') { push @{$data}, @{$databox}; } elsif ( ref($databox->[0]) eq "ARRAY" ) { # could add POSIX::strtol for hex and octal support but # can't break float conversions (how?) ($tmp = $data->slice(":,$start:$index")) .= pdl($databox); } else { # could add POSIX::strtol for hex and octal support but # can't break float conversions (how?) ($tmp = $data->slice("$start:$index")) .= pdl($databox); } $_[0] = [ $data, [] ]; } # taken outside of rcols() to avoid clutter sub _handle_types ($$$) { my $ncols = shift; my $deftype = shift; my $types = shift; barf "Unknown PDL type given for DEFTYPE.\n" unless ref($deftype) eq "PDL::Type"; my @cols = ref($types) eq "ARRAY" ? @$types : (); if ( $#cols > -1 ) { # truncate if required $#cols = $ncols if $#cols > $ncols; # check input values are sensible for ( 0 .. $#cols ) { barf "Unknown value '$cols[$_]' in TYPES array.\n" unless ref($cols[$_]) eq "PDL::Type"; } } # fill in any missing columns for ( ($#cols+1) .. $ncols ) { push @cols, $deftype; } return @cols; } # sub: _handle_types # Whether an object is an IO handle use Scalar::Util; sub _is_io_handle { my $h = shift; # reftype catches almost every handle, except: *MYHANDLE # fileno catches *MYHANDLE, but doesn't catch handles that aren't files my $reftype = Scalar::Util::reftype($h); return defined(fileno($h)) || (defined($reftype) && $reftype eq 'GLOB'); } =head2 rcols =for ref Read specified ASCII cols from a file into piddles and perl arrays (also see L</rgrep>). =for usage Usage: ($x,$y,...) = rcols( *HANDLE|"filename", { EXCLUDE => '/^!/' }, $col1, $col2, ... ) $x = rcols( *HANDLE|"filename", { EXCLUDE => '/^!/' }, [] ) ($x,$y,...) = rcols( *HANDLE|"filename", $col1, $col2, ..., { EXCLUDE => '/^!/' } ) ($x,$y,...) = rcols( *HANDLE|"filename", "/foo/", $col1, $col2, ... ) For each column number specified, a 1D output PDL will be generated. Anonymous arrays of column numbers generate 2D output piddles with dim0 for the column data and dim1 equal to the number of columns in the anonymous array(s). An empty anonymous array as column specification will produce a single output data piddle with dim(1) equal to the number of columns available. There are two calling conventions - the old version, where a pattern can be specified after the filename/handle, and the new version where options are given as as hash reference. This reference can be given as either the second or last argument. The default behaviour is to ignore lines beginning with a # character and lines that only consist of whitespace. Options exist to only read from lines that match, or do not match, supplied patterns, and to set the types of the created piddles. Can take file name or *HANDLE, and if no explicit column numbers are specified, all are assumed. For the allowed types, see L<PDL::Core/Datatype_conversions>. Options (case insensitive): EXCLUDE or IGNORE - ignore lines matching this pattern (default B<'/^#/'>). INCLUDE or KEEP - only use lines which match this pattern (default B<''>). LINES - a string pattern specifying which line numbers to use. Line numbers start at 0 and the syntax is 'a:b:c' to use every c'th matching line between a and b (default B<''>). DEFTYPE - default data type for stored data (if not specified, use the type stored in C<$PDL::IO::Misc::deftype>, which starts off as B<double>). TYPES - reference to an array of data types, one element for each column to be read in. Any missing columns use the DEFTYPE value (default B<[]>). COLSEP - splits on this string/pattern/qr{} between columns of data. Defaults to $PDL::IO::Misc::defcolsep. PERLCOLS - an array of column numbers which are to be read into perl arrays rather than piddles. Any columns not specified in the explicit list of columns to read will be returned after the explicit columns. (default B<undef>). COLIDS - if defined to an array reference, it will be assigned the column ID values obtained by splitting the first line of the file in the identical fashion to the column data. CHUNKSIZE - the number of input data elements to batch together before appending to each output data piddle (Default value is 100). If CHUNKSIZE is greater than the number of lines of data to read, the entire file is slurped in, lines split, and perl lists of column data are generated. At the end, effectively pdl(@column_data) produces any result piddles. VERBOSE - be verbose about IO processing (default C<$PDL::vebose>) =for example For example: $x = PDL->rcols 'file1'; # file1 has only one column of data $x = PDL->rcols 'file2', []; # file2 can have multiple columns, still 1 piddle output # (empty array ref spec means all possible data fields) ($x,$y) = rcols 'table.csv', { COLSEP => ',' }; # read CSV data file ($x,$y) = rcols *STDOUT; # default separator for lines like '32 24' # read in lines containing the string foo, where the first # example also ignores lines that begin with a # character. ($x,$y,$z) = rcols 'file2', 0,4,5, { INCLUDE => '/foo/' }; ($x,$y,$z) = rcols 'file2', 0,4,5, { INCLUDE => '/foo/', EXCLUDE => '' }; # ignore the first 27 lines of the file, reading in as ushort's ($x,$y) = rcols 'file3', { LINES => '27:-1', DEFTYPE => ushort }; ($x,$y) = rcols 'file3', { LINES => '27:', TYPES => [ ushort, ushort ] }; # read in the first column as a perl array and the next two as piddles # with the perl column returned after the piddle outputs ($x,$y,$name) = rcols 'file4', 1, 2 , { PERLCOLS => [ 0 ] }; printf "Number of names read in = %d\n", 1 + $#$name; # read in the first column as a perl array and the next two as piddles # with PERLCOLS changing the type of the first returned value to perl list ref ($name,$x,$y) = rcols 'file4', 0, 1, 2, { PERLCOLS => [ 0 ] }; # read in the first column as a perl array returned first followed by the # the next two data columns in the file as a single Nx2 piddle ($name,$xy) = rcols 'file4', 0, [1, 2], { PERLCOLS => [ 0 ] }; NOTES: 1. Quotes are required on patterns or use the qr{} quote regexp syntax. 2. Columns are separated by whitespace by default, use the COLSEP option separator to specify an alternate split pattern or string or specify an alternate default separator by setting C<$PDL::IO::Misc::defcolsep> . 3. Legacy support is present to use C<$PDL::IO::Misc::colsep> to set the column separator but C<$PDL::IO::Misc::colsep> is not defined by default. If you set the variable to a defined value it will get picked up. 4. LINES => '-1:0:3' may not work as you expect, since lines are skipped when read in, then the whole array reversed. 5. For consistency with wcols and rcols 1D usage, column data is loaded into the rows of the pdls (i.e., dim(0) is the elements read per column in the file and dim(1) is the number of columns of data read. =cut use vars qw/ $colsep $defcolsep $deftype /; $defcolsep = ' '; # Default column separator $deftype = double; # Default type for piddles my $defchunksize = 100; # Number of perl list items to append to piddle my $usecolsep; # This is the colsep value that is actually used # NOTE: XXX # need to look at the line-selection code. For instance, if want # lines => '-1:0:3', # read in all lines, reverse, then apply the step # -> fix point 4 above # # perhaps should just simplify the LINES option - ie remove # support for reversed arrays? sub rcols{ PDL->rcols(@_) } sub PDL::rcols { my $class = shift; barf 'Usage ($x,$y,...) = rcols( *HANDLE|"filename", ["/pattern/" or \%options], $col1, $col2, ..., [ \%options] )' if $#_<0; my $is_handle = _is_io_handle $_[0]; my $fh = $is_handle ? $_[0] : gensym; open $fh, $_[0] or die "File $_[0] not found\n" unless $is_handle; shift; # set up default options my $opt = new PDL::Options( { CHUNKSIZE => undef, COLIDS => undef, COLSEP => undef, DEFTYPE => $deftype, EXCLUDE => '/^#/', INCLUDE => undef, LINES => '', PERLCOLS => undef, TYPES => [], VERBOSE=> $PDL::verbose, } ); $opt->synonyms( { IGNORE => 'EXCLUDE', KEEP => 'INCLUDE' } ); # has the user supplied any options if ( defined($_[0]) ) { # ensure the old-style behaviour by setting the exclude pattern to undef if ( $_[0] =~ m|^/.*/$| ) { $opt->options( { EXCLUDE => undef, INCLUDE => shift } ); } elsif ( ref($_[0]) eq "Regexp" ) { $opt->options( { EXCLUDE => undef, INCLUDE => shift } ); } elsif ( ref($_[0]) eq "HASH" ) { $opt->options( shift ); } } # maybe the last element is a hash array as well $opt->options( pop ) if defined($_[-1]) and ref($_[-1]) eq "HASH"; # a reference to a hash array my $options = $opt->current(); # handle legacy colsep variable $usecolsep = (defined $colsep) ? qr{$colsep} : undef; $usecolsep = qr{$options->{COLSEP}} if $options->{COLSEP}; # what are the patterns? foreach my $pattern ( qw( INCLUDE EXCLUDE ) ) { if ( $options->{$pattern} and ref($options->{$pattern}) ne "Regexp" ) { if ( $options->{$pattern} =~ m|^/.*/$| ) { $options->{$pattern} =~ s|^/(.*)/$|$1|; $options->{$pattern} = qr($options->{$pattern}); } else { barf "rcols() - unable to process $pattern value.\n"; } } } # CHUNKSIZE controls memory/time tradeoff of piddle IO my $chunksize = $options->{CHUNKSIZE} || $defchunksize; my $nextburpindex = -1; # which columns are to be read into piddles and which into perl arrays? my @end_perl_cols = (); # unique perl cols to return at end my @perl_cols = (); # perl cols index list from PERLCOLS option @perl_cols = @{ $$options{PERLCOLS} } if $$options{PERLCOLS}; my @is_perl_col; # true if index corresponds to a perl column for (@perl_cols) { $is_perl_col[$_] = 1; }; # print STDERR "rcols: \@is_perl_col is @is_perl_col\n"; my ( @explicit_cols ) = @_; # call specified columns to read # print STDERR "rcols: \@explicit_cols is @explicit_cols\n"; # work out which line numbers are required # - the regexp's are a bit over the top my ( $x, $y, $c ); if ( $$options{LINES} ne '' ) { if ( $$options{LINES} =~ /^\s*([+-]?\d*)\s*:\s*([+-]?\d*)\s*$/ ) { $x = $1; $y = $2; } elsif ( $$options{LINES} =~ /^\s*([+-]?\d*)\s*:\s*([+-]?\d*)\s*:\s*([+]?\d*)\s*$/ ) { $x = $1; $y = $2; $c = $3; } else { barf "rcols() - unable to parse LINES option.\n"; } } # Since we do not know how many lines there are in advance, things get a bit messy my ( $index_start, $index_end ) = ( 0, -1 ); $index_start = $x if defined($x) and $x ne ''; $index_end = $y if defined($y) and $y ne ''; my $line_step = $c || 1; # $line_rev = 0/1 for normal order/reversed # $line_start/_end refer to the first and last line numbers that we want # (the values of which we may not know until we've read in all the file) my ( $line_start, $line_end, $line_rev ); if ( ($index_start >= 0 and $index_end < 0) ) { # eg 0:-1 $line_rev = 0; $line_start = $index_start; } elsif ( $index_end >= 0 and $index_start < 0 ) { # eg -1:0 $line_rev = 1; $line_start = $index_end; } elsif ( $index_end >= $index_start and $index_start >= 0 ) { # eg 0:10 $line_rev = 0; $line_start = $index_start; $line_end = $index_end; } elsif ( $index_start > $index_end and $index_end >= 0 ) { # eg 10:0 $line_rev = 1; $line_start = $index_end; $line_end = $index_start; } elsif ( $index_start <= $index_end ) { # eg -5:-1 $line_rev = 0; } else { # eg -1:-5 $line_rev = 1; } my @ret; my ($k,$fhline); my $line_num = -1; my $line_ctr = $line_step - 1; # ensure first line is always included my $index = -1; my $pdlsize = 0; my $extend = 10000; my $line_store; # line numbers of saved data RCOLS_IO: { if ($options->{COLIDS}) { print STDERR "rcols: processing COLIDS option\n" if $options->{VERBOSE}; undef $!; if (defined($fhline = <$fh>) ) { # grab first line's fields for column IDs $fhline =~ s/\r?\n$//; # handle DOS on unix files better my @v = defined($usecolsep) ? split($usecolsep,$fhline) : split(' ',$fhline); @{$options->{COLIDS}} = @v; } else { die "rcols: reading COLIDS info, $!" if $!; last RCOLS_IO; } } while( defined($fhline = <$fh>) ) { # chomp $fhline; $fhline =~ s/\r?\n$//; # handle DOS on unix files better $line_num++; # the order of these checks is important, particularly whether we # check for line_ctr before or after the pattern matching # Prior to PDL 2.003 the line checks were done BEFORE the # pattern matching # # need this first check, even with it almost repeated at end of loop, # incase the pattern matching excludes $line_num == $line_end, say last if defined($line_end) and $line_num > $line_end; next if defined($line_start) and $line_num < $line_start; next if $options->{EXCLUDE} and $fhline =~ /$options->{EXCLUDE}/; next if $options->{INCLUDE} and not $fhline =~ /$options->{INCLUDE}/; next unless ++$line_ctr == $line_step; $line_ctr = 0; $index++; my @v = defined($usecolsep) ? split($usecolsep,$fhline) : split(' ',$fhline); # map empty fields '' to undef value @v = map { $_ eq '' ? undef : $_ } @v; # if the first line, set up the output piddles using all the columns # if the user doesn't specify anything if ( $index == 0 ) { # Handle implicit multicolumns in command line if ($#explicit_cols < 0) { # implicit single col data @explicit_cols = ( 0 .. $#v ); } if (scalar(@explicit_cols)==1 and ref($explicit_cols[0]) eq "ARRAY") { if ( !scalar(@{$explicit_cols[0]}) ) { # implicit multi-col data @explicit_cols = ( [ 0 .. $#v ] ); } } my $implicit_pdls = 0; my $is_explicit = {}; foreach my $col (@explicit_cols) { if (ref($col) eq "ARRAY") { $implicit_pdls++ if !scalar(@$col); } else { $is_explicit->{$col} = 1; } } if ($implicit_pdls > 1) { die "rcols: only one implicit multicolumn piddle spec allowed, found $implicit_pdls!\n"; } foreach my $col (@explicit_cols) { if (ref($col) eq "ARRAY" and !scalar(@$col)) { @$col = grep { !$is_explicit->{$_} } ( 0 .. $#v ); } } # remove declared perl columns from pdl data list $k = 0; my @pdl_cols = (); foreach my $col (@explicit_cols) { # strip out declared perl cols so they won't be read into piddles if ( ref($col) eq "ARRAY" ) { @$col = grep { !$is_perl_col[$_] } @{$col}; push @pdl_cols, [ @{$col} ]; } elsif (!$is_perl_col[$col]) { push @pdl_cols, $col; } } # strip out perl cols in explicit col list for return at end @end_perl_cols = @perl_cols; foreach my $col (@explicit_cols) { if ( ref($col) ne "ARRAY" and defined($is_perl_col[$col]) ) { @end_perl_cols = grep { $_ != $col } @end_perl_cols; } }; # sort out the types of the piddles my @types = _handle_types( $#pdl_cols, $$options{DEFTYPE}, $$options{TYPES} ); if ( $options->{VERBOSE} ) { # dbg aid print "Reading data into piddles of type: [ "; foreach my $t ( @types ) { print $t->shortctype() . " "; } print "]\n"; } $k = 0; for (@explicit_cols) { # Using mixed list+piddle data structure for performance tradeoff # between memory usage (perl list) and speed of IO (PDL operations) if (ref($_) eq "ARRAY") { # use multicolumn piddle here push @ret, [ $class->zeroes($types[$k++],scalar(@{$_}),1), [] ]; } else { push @ret, ($is_perl_col[$_] ? [ [], [] ] : [ $class->zeroes($types[$k],1), [] ]); $k++ unless $is_perl_col[$_]; } } for (@end_perl_cols) { push @ret, [ [], [] ]; } $line_store = [ $class->zeroes(long,1), [] ]; # only need to store integers } # if necessary, extend PDL in buffered manner $k = 0; if ( $pdlsize < $index ) { for (@ret, $line_store) { _ext_lastD( $_->[0], $extend ); } $pdlsize += $extend; } # - stick perl arrays onto end of $ret $k = 0; for (@explicit_cols, @end_perl_cols) { if (ref($_) eq "ARRAY") { push @{ $ret[$k++]->[1] }, [ @v[ @$_ ] ]; } else { push @{ $ret[$k++]->[1] }, $v[$_]; } } # store the line number push @{$line_store->[1]}, $line_num; # need to burp out list if needed if ( $index >= $nextburpindex ) { for (@ret, $line_store) { _burp_1D($_,$index); } $nextburpindex = $index + $chunksize; } # Thanks to Frank Samuelson for this last if defined($line_end) and $line_num == $line_end; } } close($fh) unless $is_handle; # burp one final time if needed and # clean out additional ARRAY ref level for @ret for (@ret, $line_store) { _burp_1D($_,$index) if defined $_ and scalar @{$_->[1]}; $_ = $_->[0]; } # have we read anything in? if not, return empty piddles if ( $index == -1 ) { print "Warning: rcols() did not read in any data.\n" if $options->{VERBOSE}; if ( wantarray ) { foreach ( 0 .. $#explicit_cols ) { if ( $is_perl_col[$_] ) { $ret[$_] = PDL->null; } else { $ret[$_] = []; } } for ( @end_perl_cols ) { push @ret, []; } return ( @ret ); } else { return PDL->null; } } # if the user has asked for lines => 0:-1 or 0:10 or 1:10 or 1:-1, # - ie not reversed and the last line number is known - # then we can skip the following nastiness if ( $line_rev == 0 and $index_start >= 0 and $index_end >= -1 ) { for (@ret) { ## $_ = $_->mv(-1,0)->slice("0:${index}")->mv(0,-1) unless ref($_) eq 'ARRAY'; $_ = $_->mv(-1,0)->slice("0:${index}") unless ref($_) eq 'ARRAY'; # cols are dim(0) }; if ( $options->{VERBOSE} ) { if ( ref($ret[0]) eq 'ARRAY' ) { print "Read in ", scalar( @{ $ret[0] } ), " elements.\n"; } else { print "Read in ", $ret[0]->nelem, " elements.\n"; } } wantarray ? return(@ret) : return $ret[0]; } # Work out which line numbers we want. First we clean up the piddle # containing the line numbers that have been read in $line_store = $line_store->slice("0:${index}"); # work out the min/max line numbers required if ( $line_rev ) { if ( defined($line_start) and defined($line_end) ) { my $dummy = $line_start; $line_start = $line_end; $line_end = $dummy; } elsif ( defined($line_start) ) { $line_end = $line_start; } else { $line_start = $line_end; } } $line_start = $line_num + 1 + $index_start if $index_start < 0; $line_end = $line_num + 1 + $index_end if $index_end < 0; my $indices; { no warnings 'precedence'; if ( $line_rev ) { $indices = which( $line_store >= $line_end & $line_store <= $line_start )->slice('-1:0'); } else { $indices = which( $line_store >= $line_start & $line_store <= $line_end ); } } # truncate the piddles for my $col ( @explicit_cols ) { if ( ref($col) eq "ARRAY" ) { for ( @$col ) { $ret[$_] = $ret[$_]->index($indices); } } else { $ret[$col] = $ret[$col]->index($indices) unless $is_perl_col[$col] }; } # truncate/reverse/etc the perl arrays my @indices_array = list $indices; foreach ( @explicit_cols, @end_perl_cols ) { if ( $is_perl_col[$_] ) { my @temp = @{ $ret[$_] }; $ret[$_] = []; foreach my $i ( @indices_array ) { push @{ $ret[$_] }, $temp[$i] }; } } # print some diagnostics if ( $options->{VERBOSE} ) { my $done = 0; foreach my $col (@explicit_cols) { last if $done; next if $is_perl_col[$col]; print "Read in ", $ret[$col]->nelem, " elements.\n"; $done = 1; } foreach my $col (@explicit_cols, @end_perl_cols) { last if $done; print "Read in ", $ret[$col]->nelem, " elements.\n"; $done = 1; } } # fix 2D pdls to match what wcols generates foreach my $col (@ret) { next if ref($col) eq "ARRAY"; $col = $col->mv(0,1) if $col->ndims == 2; } wantarray ? return(@ret) : return $ret[0]; } =head2 wcols =for ref Write ASCII columns into file from 1D or 2D piddles and/or 1D listrefs efficiently. Can take file name or *HANDLE, and if no file/filehandle is given defaults to STDOUT. Options (case insensitive): HEADER - prints this string before the data. If the string is not terminated by a newline, one is added. (default B<''>). COLSEP - prints this string between columns of data. Defaults to $PDL::IO::Misc::defcolsep. FORMAT - A printf-style format string that is cycled through column output for user controlled formatting. =for usage Usage: wcols $data1, $data2, $data3,..., *HANDLE|"outfile", [\%options]; # or wcols $format_string, $data1, $data2, $data3,..., *HANDLE|"outfile", [\%options]; where the $dataN args are either 1D piddles, 1D perl array refs, or 2D piddles (as might be returned from rcols() with the [] column syntax and/or using the PERLCOLS option). dim(0) of all piddles written must be the same size. The printf-style $format_string, if given, overrides any FORMAT key settings in the option hash. e.g., =for example $x = random(4); $y = ones(4); wcols $x, $y+2, 'foo.dat'; wcols $x, $y+2, *STDERR; wcols $x, $y+2, '|wc'; $x = sequence(3); $y = zeros(3); $c = random(3); wcols $x,$y,$c; # Orthogonal version of 'print $x,$y,$c' :-) wcols "%10.3f", $x,$y; # Formatted wcols "%10.3f %10.5g", $x,$y; # Individual column formatting $x = sequence(3); $y = zeros(3); $units = [ 'm/sec', 'kg', 'MPH' ]; wcols $x,$y, { HEADER => "# x y" }; wcols $x,$y, { Header => "# x y", Colsep => ', ' }; # case insensitive option names! wcols " %4.1f %4.1f %s",$x,$y,$units, { header => "# Day Time Units" }; $a52 = sequence(5,2); $y = ones(5); $c = [ 1, 2, 4 ]; wcols $a52; # now can write out 2D pdls (2 columns data in output) wcols $y, $a52, $c # ...and mix and match with 1D listrefs as well NOTES: 1. Columns are separated by whitespace by default, use C<$PDL::IO::Misc::defcolsep> to modify the default value or the COLSEP option 2. Support for the C<$PDL::IO::Misc::colsep> global value of PDL-2.4.6 and earlier is maintained but the initial value of the global is undef until you set it. The value will be then be picked up and used as if defcolsep were specified. 3. Dim 0 corresponds to the column data dimension for both rcols and wcols. This makes wcols the reverse operation of rcols. =cut *wcols = \&PDL::wcols; sub PDL::wcols { barf 'Usage: wcols($optional_format_string, 1_or_2D_pdls, *HANDLE|"filename", [\%options])' if @_<1; # handle legacy colsep variable $usecolsep = (defined $colsep) ? $colsep : $defcolsep; # if last argument is a reference to a hash, parse the options my ($format_string, $step, $fh); my $header; if ( ref( $_[-1] ) eq "HASH" ) { my $opt = pop; foreach my $key ( keys %$opt ) { if ( $key =~ /^H/i ) { $header = $opt->{$key}; } # option: HEADER elsif ( $key =~ /^COLSEP/i ) { $usecolsep = $opt->{$key}; } # option: COLSEP elsif ( $key =~ /^FORMAT/i ) { $format_string = $opt->{$key}; } # option: FORMAT else { print "Warning: wcols does not understand option <$key>.\n"; } } } if (ref(\$_[0]) eq "SCALAR" || $format_string) { $format_string = shift if (ref(\$_[0]) eq "SCALAR"); # 1st arg not piddle, explicit format string overrides option hash FORMAT $step = $format_string; $step =~ s/(%%|[^%])//g; # use step to count number of format items $step = length ($step); } my $file = $_[-1]; my $file_opened; my $is_handle = !UNIVERSAL::isa($file,'PDL') && !UNIVERSAL::isa($file,'ARRAY') && _is_io_handle $file; if ($is_handle) { # file handle passed directly $fh = $file; pop; } else{ if (ref(\$file) eq "SCALAR") { # Must be a file name $fh = gensym; if (!$is_handle) { $file = ">$file" unless $file =~ /^\|/ or $file =~ /^\>/; open $fh, $file or barf "File $file can not be opened for writing\n"; } pop; $file_opened = 1; } else{ # Not a filehandle or filename, assume something else # (probably piddle) and send to STDOUT $fh = *STDOUT; } } my @p = @_; my $n = (ref $p[0] eq 'ARRAY') ? $#{$p[0]}+1 : $p[0]->dim(0); my @dogp = (); # need to break 2D pdls into a their 1D pdl components for (@p) { if ( ref $_ eq 'ARRAY' ) { barf "wcols: 1D args must have same number of elements\n" if scalar(@{$_}) != $n; push @dogp, $_; } else { barf "wcols: 1D args must have same number of elements\n" if $_->dim(0) != $n or $_->getndims > 2; if ( $_->getndims == 2 ) { push @dogp, $_->dog; } else { push @dogp, $_; } } } if ( defined $header ) { $header .= "\n" unless $header =~ m/\n$/; print $fh $header; } my $i; my $pcnt = scalar @dogp; for ($i=0; $i<$n; $i++) { if ($format_string) { my @d; my $pdone = 0; for (@dogp) { push @d,_at_1D($_,$i); $pdone++; if (@d == $step) { printf $fh $format_string,@d; printf $fh $usecolsep unless $pdone==$pcnt; $#d = -1; } } if (@d && !$i) { my $str; if ($#dogp>0) { $str = ($#dogp+1).' columns don\'t'; } else { $str = '1 column doesn\'t'; } $str .= " fit in $step column format ". '(even repeated) -- discarding surplus'; carp $str; # printf $fh $format_string,@d; # printf $fh $usecolsep; } } else { my $pdone = 0; for (@dogp) { $pdone++; print $fh _at_1D($_,$i) . ( ($pdone==$pcnt) ? '' : $usecolsep ); } } print $fh "\n"; } close($fh) if $file_opened; return 1; } =head2 swcols =for ref generate string list from C<sprintf> format specifier and a list of piddles C<swcols> takes an (optional) format specifier of the printf sort and a list of 1D piddles as input. It returns a perl array (or array reference if called in scalar context) where each element of the array is the string generated by printing the corresponding element of the piddle(s) using the format specified. If no format is specified it uses the default print format. =for usage Usage: @str = swcols format, pdl1,pdl2,pdl3,...; or $str = swcols format, pdl1,pdl2,pdl3,...; =cut *swcols = \&PDL::swcols; sub PDL::swcols{ my ($format_string,$step); my @outlist; if (ref(\$_[0]) eq "SCALAR") { $step = $format_string = shift; # 1st arg not piddle $step =~ s/(%%|[^%])//g; # use step to count number of format items $step = length ($step); } my @p = @_; my $n = (ref $p[0] eq 'ARRAY') ? $#{$p[0]}+1 : $p[0]->nelem; for (@p) { if ( ref $_ eq 'ARRAY' ) { barf "swcols: 1D args must have same number of elements\n" if scalar(@{$_}) != $n; } else { barf "swcols: 1D args must have same number of elements\n" if $_->nelem != $n or $_->getndims!=1; } } my $i; for ($i=0; $i<$n; $i++) { if ($format_string) { my @d; for (@p) { push @d,_at_1D($_,$i); if (@d == $step) { push @outlist,sprintf $format_string,@d; $#d = -1; } } if (@d && !$i) { my $str; if ($#p>0) { $str = ($#p+1).' columns don\'t'; } else { $str = '1 column doesn\'t'; } $str .= " fit in $step column format ". '(even repeated) -- discarding surplus'; carp $str; # printf $fh $format_string,@d; # printf $fh $usecolsep; } } else { for (@p) { push @outlist,sprintf _at_1D($_,$i),$usecolsep; } } } wantarray ? return @outlist: return \@outlist; } =head2 rgrep =for ref Read columns into piddles using full regexp pattern matching. Options: UNDEFINED: This option determines what will be done for undefined values. For instance when reading a comma-separated file of the type C<1,2,,4> where the C<,,> indicates a missing value. The default value is to assign C<$PDL::undefval> to undefined values, but if C<UNDEFINED> is set this is used instead. This would normally be set to a number, but if it is set to C<Bad> and PDL is compiled with Badvalue support (see L<PDL::Bad/>) then undefined values are set to the appropriate badvalue and the column is marked as bad. DEFTYPE: Sets the default type of the columns - see the documentation for L</rcols()> TYPES: A reference to a Perl array with types for each column - see the documentation for L</rcols()> BUFFERSIZE: The number of lines to extend the piddle by. It might speed up the reading a little bit by setting this to the number of lines in the file, but in general L</rasc()> is a better choice Usage =for usage ($x,$y,...) = rgrep(sub, *HANDLE|"filename") e.g. =for example ($x,$y) = rgrep {/Foo (.*) Bar (.*) Mumble/} $file; i.e. the vectors C<$x> and C<$y> get the progressive values of C<$1>, C<$2> etc. =cut sub rgrep (&@) { barf 'Usage ($x,$y,...) = rgrep(sub, *HANDLE|"filename", [{OPTIONS}])' if $#_ > 2; my (@ret,@v,$nret); my ($m,$n)=(-1,0); # Count/PDL size my $pattern = shift; my $is_handle = _is_io_handle $_[0]; my $fh = $is_handle ? $_[0] : gensym; open $fh, $_[0] or die "File $_[0] not found\n" unless $is_handle; if (ref($pattern) ne "CODE") { die "Got a ".ref($pattern)." for rgrep?!"; } # set up default options my $opt = new PDL::Options( { DEFTYPE => $deftype, TYPES => [], UNDEFINED => $PDL::undefval, BUFFERSIZE => 10000 } ); # Check if the user specified options my $u_opt = $_[1] || {}; $opt->options( $u_opt); my $options = $opt->current(); # If UNDEFINED is set to .*bad.* then undefined are set to # bad - unless we have a Perl that is not compiled with Bad support my $undef_is_bad = ($$options{UNDEFINED} =~ /bad/i); if ($undef_is_bad && !$PDL::Bad::Status) { carp "UNDEFINED cannot be set to Badvalue when PDL hasn't been compiled with Bad value support - \$PDL::undefval used instead\n"; $undef_is_bad = 0; } barf "Unknown PDL type given for DEFTYPE.\n" unless ref($$options{DEFTYPE}) eq "PDL::Type"; while(<$fh>) { next unless @v = &$pattern; $m++; # Count got if ($m==0) { $nret = $#v; # Last index of values to return # Handle various columns as in rcols - added 18/04/05 my @types = _handle_types( $nret, $$options{DEFTYPE}, $$options{TYPES} ); for (0..$nret) { # Modified 18/04/05 to use specified precision. $ret[$_] = [ PDL->zeroes($types[$_], 1), [] ]; } } else { # perhaps should only carp once... carp "Non-rectangular rgrep" if $nret != $#v; } if ($n<$m) { for (0..$nret) { _ext_lastD( $ret[$_]->[0], $$options{BUFFERSIZE} ); # Extend PDL in buffered manner } $n += $$options{BUFFERSIZE}; } for(0..$nret) { # Set values - '1*' is to ensure numeric # We now (JB - 18/04/05) also check for defined values or not # Ideally this should include Badvalue support.. if ($v[$_] eq '') { # Missing value - let us treat this specially if ($undef_is_bad) { set $ret[$_]->[0], $m, $$options{DEFTYPE}->badvalue(); # And set bad flag on $ref[$_]! $ret[$_]->[0]->badflag(1); } else { set $ret[$_]->[0], $m, $$options{UNDEFINED}; } } else { set $ret[$_]->[0], $m, 1*$v[$_]; } } } close($fh) unless $is_handle; for (@ret) { $_ = $_->[0]->slice("0:$m")->copy; }; # Truncate wantarray ? return(@ret) : return $ret[0]; } =head2 rdsa =for ref Read a FIGARO/NDF format file. Requires non-PDL DSA module. Contact Frossie (frossie@jach.hawaii.edu) Usage: =for usage ([$xaxis],$data) = rdsa($file) =for example $x = rdsa 'file.sdf' Not yet tested with PDL-1.9X versions =cut sub rdsa{PDL->rdsa(@_)} use vars qw/ $dsa_loaded /; sub PDL::rdsa { my $class = shift; barf 'Usage: ([$xaxis],$data) = rdsa($file)' if $#_!=0; my $file = shift; my $pdl = $class->new; my $xpdl; eval 'use DSA' unless $dsa_loaded++; barf 'Cannot use DSA library' if $@ ne ""; my $status = 0; # Most of this stuff stolen from Frossie: dsa_open($status); dsa_named_input('IMAGE',$file,$status); goto skip if $status != 0; dsa_get_range('IMAGE',my $vmin,my $vmax,$status); my @data_dims; dsa_data_size('IMAGE',5, my $data_ndims, \@data_dims, my $data_elements, $status); dsa_map_data('IMAGE','READ','FLOAT',my $data_address,my $data_slot, $status); @data_dims = @data_dims[0..$data_ndims-1]; print "Dims of $file = @data_dims\n" if $PDL::verbose; $pdl->set_datatype($PDL_F); $pdl->setdims([@data_dims]); my $dref = $pdl->get_dataref; mem2string($data_address,4*$data_elements,$$dref); $pdl->upd_data(); if (wantarray) { # Map X axis values my @axis_dims; dsa_axis_size('IMAGE',1,5, my $axis_ndims, \@axis_dims, my $axis_elements, $status); dsa_map_axis_data('IMAGE',1,'READ','FLOAT',my $axis_address, my $axis_slot,$status); @axis_dims = @axis_dims[0..$axis_ndims-1]; $xpdl = $class->new; $xpdl->set_datatype($PDL_F); $xpdl->setdims([@axis_dims]); my $xref = $xpdl->get_dataref; mem2string($axis_address,4*$axis_elements,$$xref); $xpdl->upd_data(); } skip: dsa_close($status); barf("rdsa: obtained DSA error") if $status != 0; return ($xpdl,$pdl); } =head2 isbigendian =for ref Determine endianness of machine - returns 0 or 1 accordingly =cut sub PDL::isbigendian { return 0; }; *isbigendian = \&PDL::isbigendian; =head2 rasc =for ref Simple function to slurp in ASCII numbers quite quickly, although error handling is marginal (to nonexistent). =for usage $pdl->rasc("filename"|FILEHANDLE [,$noElements]); Where: filename is the name of the ASCII file to read or open file handle $noElements is the optional number of elements in the file to read. (If not present, all of the file will be read to fill up $pdl). $pdl can be of type float or double (for more precision). =for example # (test.num is an ascii file with 20 numbers. One number per line.) $in = PDL->null; $num = 20; $in->rasc('test.num',20); $imm = zeroes(float,20,2); $imm->rasc('test.num'); =cut sub rasc {PDL->rasc(@_)} sub PDL::rasc { use IO::File; my ($pdl, $file, $num) = @_; $num = -1 unless defined $num; my $fi = $file; my $is_openhandle = defined fileno $fi ? 1 : 0; unless ($is_openhandle) { barf 'usage: rasc $pdl, "filename"|FILEHANDLE, [$num_to_read]' if !defined $file || ref $file; $fi = new IO::File "<$file" or barf "Can't open $file"; } $pdl->_rasc(my $ierr=null,$num,$fi); close $fi unless $is_openhandle; return all $ierr > 0; } # ---------------------------------------------------------- =head2 rcube =for ref Read list of files directly into a large data cube (for efficiency) =for usage $cube = rcube \&reader_function, @files; =for example $cube = rcube \&rfits, glob("*.fits"); This IO function allows direct reading of files into a large data cube, Obviously one could use cat() but this is more memory efficient. The reading function (e.g. rfits, readfraw) (passed as a reference) and files are the arguments. The cube is created as the same X,Y dims and datatype as the first image specified. The Z dim is simply the number of images. =cut sub rcube { my $reader = shift; barf "Usage: blah" unless ref($reader) eq "CODE"; my $k=0; my ($im,$cube,$tmp,$nx,$ny); my $nz = scalar(@_); for my $file (@_) { print "Slice ($k) - reading file $file...\n" if $PDL::verbose; $im = &$reader($file); ($nx, $ny) = dims $im; if ($k == 0) { print "Creating $nx x $ny x $nz cube...\n" if $PDL::verbose; $cube = $im->zeroes($im->type,$nx,$ny,$nz); } else { barf "Dimensions do not match for file $file!\n" if $im->getdim(0) != $nx or $im->getdim(1) != $ny ; } $tmp = $cube->slice(":,:,($k)"); $tmp .= $im; $k++; } return $cube; } *_rasc = \&PDL::_rasc; ; =head1 AUTHOR Copyright (C) Karl Glazebrook 1997, Craig DeForest 2001, 2003, and Chris Marshall 2010. All rights reserved. There is no warranty. You are allowed to redistribute this software / documentation under certain conditions. For details, see the file COPYING in the PDL distribution. If this file is separated from the PDL distribution, the copyright notice should be included in the file. =cut # Exit with OK status 1;