Perl CGI charts, actual plots and not image files

Shell Programming and Scripting
1

Does anyone know how to generate CGI charts which are not images , the one I am using generates image files

e.g

$mygraph3->set( 'x_labels_vertical' => 1 );
$mygraph3->set_legend_font(GD::gdMediumBoldFont);
$mygraph3->set_legend('Test Plot');
my $myimage3 = $mygraph3->plot(\@data3)->png;
print "Content-type: image/png\n\n";
print "$myimage3";
2

If not an image, what would you want it to generate?

3

I want to generate some html plots so that scrolling the mouse over the plots show the values , an image doesn't look good .

4

Ah, you want gnuplot to act in HTML like it does over X11 or on Windows.

I wasn't aware of this ability of its but it seems to be documented:

3) Creating a basic web page with a single mouseable plot

The canvas terminal driver itself will create a basic html document containing
a mousable plot.  The command options to do this are
        set term canvas standalone mousing jsdir "http://myserver"
        set output 'myplot.html'
This document contains
        - a reference to style sheet gnuplot_mouse.css
        - a reference to support script gnuplot_mouse.js
        - a javascript function named 'gnuplot_canvas'
        - a canvas element named 'gnuplot_canvas' that will be drawn in by the
          javascript function of the same name
        - an html table containing the readout for mouse coordinates, as well
          as clickable icons for additional mousing operations
        - an html table containing the readout for mouse coordinates, as well
          as clickable icons for additional mousing operations
The *.css and *.js references point back to whatever source URL you specified
in the jsdir option to the 'set term' command.  For example:
<link text="text/css" href="http://myserver/gnuplot_mouse.css" rel="stylesheet">
In order for viewers to use your plot document, they must be able to access the
*.css and *.js files via the URL embedded in the document.
5

Thnx let me try to generate a few webpages and see if it works the way I want .