NAME

Chart::Strip - Draw strip chart type graphs.

SYNOPSIS

    use Chart::Strip;

    my $ch = Chart::Strip->new(
	         title   => 'Happiness of our Group',
		 # other options ...
             );

    $ch->add_data( $davey_data, { style => 'line',
				  color => 'FF0000',
				  label => 'Davey' } );

    $ch->add_data( $jenna_data, { style => 'line',
				  color => '00FF88',
				  label => 'Jenna' } );

    print $ch->png();

DESCRIPTION

The Chart::Strip package plots data values versus time graphs, such as used for seismographs, EKGs, or network usage reports.

It can plot multiple data sets on one graph. It offers several styles of plots. It automatically determines the proper ranges and labels for both axii.

USAGE

Create the Chart

    $chart = Chart::Strip->new();
    $chart = Chart::Strip->new(
			       option1 => value,
			       option2 => value,
			       );

If no options are specified, sensible default values will be used. The following options are recognized:

width

The width of the image

height

The height of the image.

title

The title of the graph. Will be placed centered at the top.

x_label

The label for the x axis. Will be placed centered at the bottom.

y_label

The label for the y axis. Will be placed vertically along the left side.

draw_grid

Should a grid be drawn on the graph?

draw_border

Should a border be drawn around the edge of the image?

draw_tic_labels

Should value labels be shown?

draw_data_labels

Should each data set be labeled?

transparent

Should the background be transparent?

grid_on_top

Should the grid be drawn over the data (1) or below the data (0)?

binary

Use powers of 2 instead of powers of 10 for the y axis labels.

Adding Data

$chart->add_data( $data, $options );

The data should be an array ref of data points. Each data point should be a hash ref containing:

    {
	time  => $time_t,  # must be a unix time_t 
	value => $value,   # the data value
	color => $color,   # optional
    }
or, range style graphs should contain:
    
    {
	time  => $time_t,  # must be a unix time_t 
	min   => $low,     # the minimum data value
	max   => $high,    # the maximum data value
	color => $color,   # optional, used for this one point
    }

and the options may contain:

    {
	color => 'FF00FF',           # color used for the graph
	label => 'New England',      # name of the data set
    }

Outputing The Image

$chart->png()

Will return the PNG image

$chart->jpeg()

Will return the jpeg image

$chart->gd()

Will return the underlying GD object.

EXAMPLE IMAGES

http://argus.tcp4me.com/shots.html

BUGS

There are no known bugs in the module.

SEE ALSO

Yellowstone National Park.

AUTHOR

Jeff Weisberg - http://www.tcp4me.com