NAME
SVG::Sparkline::Utils - Utility functions used by the sparkline type modules.
VERSION
This document describes SVG::Sparkline::Utils version 1.10
DESCRIPTION
This module is not intended to be used directly. It is provided to support the different types of sparklines.
INTERFACE
format_f
Convert numeric data to a reasonable output format for sparkline-sized SVG. No more than 2 decimal places are displayed and all trailing zeros after the decimal place are removed.
calculate_xscale
Given an SVG::Sparkline argument hash and a range of x values, calculate the xscaling.
The following optional values are read from $args: width, padx, and xscale. Depending on the various values, the following values in $args may be updated: xscale and width.
calculate_yscale_and_offset
Given an SVG::Sparkline argument hash and a range of y values, calculate the yscaling and y offset for the graphic.
The following optional values are read from $args: height, pady, and yscale. Depending on the various values, the following values in $args may be updated: yscale, height, and yoff.
xypairs_to_points_str
Given a reference to an array of x, y pairs ($vals) and scaling factors ($xscale, $yscale), create a string appropriate for the points attribute of either an SVG polyline or polygon element graphing these points.
make_svg
Create the SVG object with the proper base parameters for a sparkline. Apply the supplied parameters as well.
summarize_values
Given a list of numeric values generate a structured summary simplifying changes for later. Calculate min, max, and range.
summarize_xy_values
Given a list of pairs of numeric values, generate a structured summary simplifying changes for later. Calculate min, max, range for the x and y values supplied.
If supplied with a list of numeric values, instead of a list of pairs, create a list of appropriate pairs and calculate the summaries as above.
validate_array_param
Validate an array parameter or throw an exception.
mark_to_index
Given the sparkline type, a mark index and a reference to an array of values, return a numeric index representing $index. Throw an exception on error.
range_mark_to_index
Given the sparkline type, a mark index and a reference to an array of high/low pairs, return a numeric index representing $index. Throw an exception on error.
DIAGNOSTICS
The diagnostics are reported where they are emitted by the library.
CONFIGURATION AND ENVIRONMENT
SVG::Sparkline::Utils requires no configuration files or environment variables.
DEPENDENCIES
INCOMPATIBILITIES
None reported.
BUGS AND LIMITATIONS
No bugs have been reported.
AUTHOR
G. Wade Johnson gwadej@cpan.org
LICENCE AND COPYRIGHT
Copyright (c) 2013, G. Wade Johnson gwadej@cpan.org. All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl 5.8.0. See perlartistic.
DISCLAIMER OF WARRANTY
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