Re: [Gnuplot-info] HTML image maps

[Thomas S. <t.s...@fz...>]

after plotting a whole bunch of variables is set, see 'show variables all'.
amongst these variables there are
GPVAL_TERM_XMIN, GPVAL_TERM_XMAX,
GPVAL_TERM_YMIN, GPVAL_TERM_YMAX
which give the corners of the graph in pixels.
(you need version 4.4)

together with the information in
GPVAL_X_MIN, GPVAL_X_MAX, ...
it should be easy to translate data point coordinates into
pixels.

you should generate your plot, then replot with 'set table <filename>'
the resulting file should contain all of your data points in graph
coordinates which with the above variables you may convert into
terminal screen coordinates.


scldad wrote:
> 
> I have seen this question before but not any answers.
> 
> I need to generate plots of data where the X axis is always date/time.
> 
> These plot image files will be included in web pages via img tags.
> 
> I also need to make the resulting web image "clickable" via an image map
> so
> that viewers can see the original data values.
> 
> How can one generate the relevant HTML image maps (or some form of text
> file
> with identifiable coordinate pairs) with gnuplot?
> 
> (I currently do this with grace plots by replicating the PNG plots with
> the
> Metadata output option and feeding the results plus the original data file
> through a gawk script.)
> 
> TIA,
> Stephen Davies
> -- 
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