Okay, here is the sub that is causing the problem.

sub get_hotspot
{
    my $self = shift;
    my $ds = shift;        # Which data set
    my $np = shift;        # Which data point?

    if (defined $np && defined $ds)
    {
        return @{$self->{_hotspots}->[$ds]->[$np]};
    }
    elsif (defined $ds)
    {
        return @{$self->{_hotspots}->[$ds]};
    }
    else
    {
        return @{$self->{_hotspots}};
    }
}

[download]
Off the top of my head, I'd say that you are pointing to a non-existant data set or point.
Make sure that you really want to put the hotspot on the second data set.
To put the hotspot on the first data set try this:
@list = $dia->get_hotspot(0,$point);
Also check to see if $point is a valid point in the chosen data set.

In reply to Re: GD & GD::Graph by Mr. Muskrat
in thread GD & GD::Graph by Anonymous Monk

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.