Re: Datablocks, gnuplot "every", plot using row identifier?

[Paul Kienzle]

You could use scatter(X,Y,[],C) from octave-forge,
where C is a color index.  Values in C depend on
the particulars of the gnuplot device, but I believe
they are in the range 1:6.

The heart of the code looks like:

        for color = unique(c)
          i =  (color == c);
          plot(x(i), y(i), sprintf(";;%d%s",color,marker));
        endfor

Paul Kienzle
address@hidden

On Feb 13, 2004, at 10:49 PM, Henry F. Mollet wrote:

> I'd like to plot two column vectors (or could be a column vector 
> "against"
> a number of columns in a matrix) and use an identifier for the 
> selection of
> different symbols and/or colors in different datablocks. For example, 
> first
> 10 row datapoint to be red (according to ID = 1), next 10 rows 
> datapoints to
> be blue (according to ID = 2) etc.
>
> In gnuplot, I believe this could be accomplished using "every":
> plot 'file' every :::0::0 (data in block 1)
> replot
> plot 'file' every :::1::1 (data in block 2)
> When I tried "every' in octave I did not work but it works in gnuplot.
> (In gnuplot blocks are separated by blank records which octave doesn't
> allow?)
>
> In Octave, if I use
> plot (myColVector ,MyMatrixWithSay3Cols)
> then I'll get 3 curves with 3 different colors by default.
> What I need is 3 different colors when I use
> Plot (myColVector1, myColVector2, "ColorAccToIDorBlock')
> where the two colVectors are somehow divided up into datablocks or 
> labeled
> by a identifer (could be color identifier, 1 for red, 2 for green, 3 
> for
> blue).
>
> How do I do this. Sorry for not being able to better describe it.
> Henry
>
>
>
> -------------------------------------------------------------
> Octave is freely available under the terms of the GNU GPL.
>
> Octave's home on the web:  http://www.octave.org
> How to fund new projects:  http://www.octave.org/funding.html
> Subscription information:  http://www.octave.org/archive.html
> -------------------------------------------------------------



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------