Re: [Gnuplot-info] gnuplot language

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

'surface1.16.gnu' simply doesn't work with data, because
it works in parametric mode using 2 parameters (u,v) which
require the use of functions to map to (x,y,z), producing
vertical surfaces which in non-parametric mode are not
possible to plot.

data from a file are read as (x,y,z) triples, therefore 'splot'
works in non-parametric mode, so there is only one z-value
per (x,y) coordinate.
this means, no way to produce vertical surfaces which need
two z-values per (x,y) coordinate.

> For example taking this demo and making it into a demo that uses
> experimental data would provide an excellent example
> of using data files.
>
> http://gnuplot.sourceforge.net/demo_4.2/surface1.16.gnu

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