How to create heat map in perl

huzefa52 has asked for the wisdom of the Perl Monks concerning the following question:

Hi, I want to create heat map in perl. For that i am using Chart::Gnuplot library. Below is my code when i am running this code it is giving me error saying "undefined variable: noenhanced". Can anyone help me on this or can suggest me good library to create heat map.

#!/usr/bin/perl
#use strict;
use Chart::Gnuplot;

# Create the chart object
my $chart = Chart::Gnuplot->new(
    output     => "plot3d_10.png",
    title      => "A heat map",
    view       => 'map',
    isosamples => 60,
);

# Data set object
my $dataSet = Chart::Gnuplot::DataSet->new(
    func  => "-(x**2 + y**2)",
    style => 'pm3d',
);

# Plot the graph
$chart->plot3d($dataSet);
[download]

Comment on How to create heat map in perl Download Code

Replies are listed 'Best First'.
Re: How to create heat map in perl by daxim (Curate) on Sep 03, 2013 at 14:21 UTC
Works for me: Chart-Gnuplot 0.20 and gnuplot 4.6.1 Update - try: `title => { text => "A heat map", enhanced => 0, },` [download]	[reply] [d/l]
Re: How to create heat map in perl by VinsWorldcom (Prior) on Sep 03, 2013 at 15:40 UTC
Works for me too on Windows 7 x64 with Strawberry Perl 5.16.1 and GnuPlot 4.4 patchlevel 3. I did need to add two options to get the Windows version to work: `[...] my $chart = Chart::Gnuplot->new( gnuplot => 'c:/usr/bin/gnuplot.bat', # req'd for Win32 terminal => 'png', # req'd for Win32 [...]` [download]	[reply] [d/l]