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Groups > comp.graphics.apps.gnuplot > #551

Re: Plotting into table with multiple columns

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Am 2011-08-27 13:41, schrieb Hans-Bernhard Bröker:

> There's a huge problem with that idea. There's no particular reason
> every dataset should have the same number of samples, much less the same
> x positions. Please keep in mind that functions in gnuplot are,
> effectively, just internal datafile generators.

Well, I don't see the problem, rather I do indeed see a huge particular 
reason why the datasets should have equal dimensions and x positions in 
almost all relevant cases: Using a single plot/splot command in the 
table mode already implies equal samples number for all plotted 
functions since it is defined by a single "set samples" command before. 
Furthermore, a single plot/splot command is usually preceded by a single 
xrange definition.

In contrast, I currently do not see any possibility (nor the necessity) 
to change the number of samples during a plot. For subsequent plot 
commands (e.g. with replot) the sequential block structure is, of 
course, useful (although I would prefer to use separate table files 
instead).

Unequal xranges may occur of one lets gnuplot autoscale the x range for 
all functions individually (I've not tested whether this is possible), 
but in that case sequential blocks as fall-back option are OK.

We are talking here about tabulated data from functions, not from 
reading existing data files.

> As soon as gnuplot actually gets for loops around commands: sure. So far

A have found a workaround, although this introduces a separate gnuplot 
file: The data are plotted in a iteratetly reread file using print 
sprintf(...).

> In the end, you're making the opposite of a very common mistake. Many
> people out there abuse spreadsheets as plotting programs. You appear to
> be trying to abuse gnuplot as a spreadsheet.

Here, the reason is to have an easy way to write out data from gnuplot 
to give the user the possibility to use them by another software. Of 
course, the same could also be done by a separate program, but doing it 
"on the fly" while printing is, in my opionion, more elegant.

-- 
Gruß,
       Ingo

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Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-08-27 11:24 +0200
  Re: Plotting into table with multiple columns Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-08-27 13:41 +0200
    Re: Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-08-27 17:04 +0200
  Re: Plotting into table with multiple columns sfeam <sfeam@users.sourceforge.net> - 2011-08-27 22:56 -0700
    Re: Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-08-28 12:59 +0200
      Re: Plotting into table with multiple columns Christoph Bersch <usenet@bersch.net> - 2011-09-02 10:23 +0200
      Re: Plotting into table with multiple columns "EAMerritt@gmail.com" <eamerritt@gmail.com> - 2011-09-21 16:43 -0700
        Re: Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-10-08 13:16 +0200
        set palette cubehelix Ingo Thies <ingo.thies@gmx.de> - 2011-10-08 13:55 +0200
          Re: set palette cubehelix sfeam <sfeam@users.sourceforge.net> - 2011-10-08 10:48 -0700
            Re: set palette cubehelix sfeam <sfeam@users.sourceforge.net> - 2011-10-08 14:30 -0700

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