unable to upload the html file made from gnuplot canvas

[hpdp]

I made a html file using gnuplot canvas:

gnuplot> set terminal canvas
Terminal type set to 'canvas' Options are ' solid butt size 600,400 fsize 10 lw 1 fontscale 1
standalone'
gnuplot> set output 'output.html'
gnuplot> plot [0:25] sin(x)

But when I opened the output.html at browser, it didn't display anything, just blank page. I looked the content of output.html, it seems ok.

Thanks for any help!!

[Ethan Merritt]

The top of your output file should look like this:

<title>Gnuplot Canvas Graph</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--[if IE]><script type="text/javascript" src="excanvas.js"></script><![endif]-->
<script src="/usr/local/share/gnuplot/4.6/js/canvasmath.js"></script>
<script src="/usr/local/share/gnuplot/4.6/js/gnuplot_common.js"></script>

Notice that it instructs the browser to load javascript from (in my case) the directory /usr/local/share/gnuplot/4.6/js/. This default location is determined at the time gnuplot was built. It might be different on your system.

Anyhow, the most likely cause of a blank screen in the browser is that the javascript files are not found in that directory. You can either put them there, or specify a different place to look for them. For example

set term canvas jsdir "http://gnuplot.sourceforge.net/demo_canvas"

[hpdp]

Thank you, Ethan!! It works now! I copied the js files to my local dir, then
set term canvas jsdir "my local dir"

Now I have graph.html which displays a simple graph at browser. My next step is
to make the datapoint(notes) clickable. When I click a datapoint, it should take
the x,y value and call a cgi to display a result at another page.
Can this be done?
I searched the web, but can't find a good site about it.
Any information are greatly appreciated!!!
Thanks!!!!

[Ethan Merritt]

There was a recent discussion about this, but I can't seem to find it [too many mailing lists, wikis, trackers, ...]

Anyhow - the closest we have right now is the hypertext option. You can associate a URL with each point if you like but it will pop up a box showing the URL itself as hypertext rather than triggering it as a hyperlink.

I would like to see discussion as to whether it would be a good idea to provide a clickable link, and if so, how to do this for wxt/windows/cairo. I already know how to do it for the canvas and svg terminals, but if we do this at all it would better to support as many terminal types as possible.