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]

In reply to How to create heat map in perl by huzefa52

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.