problem with plot / hold

[Matthias Brennwald]

Dear all,

I'm running Octave 2.1.72 and Mac OS X with gnuplot 4.0.

I want to plot three data sets in two plots (using subplot). The  
first two data sets should appear in the same plot, whereas the third  
data set should appear in its own plot (without the other two data  
sets). Consider the following commands to plot the three (fake) data  
sets:

subplot(2,1,1);     % open up the first plot
plot(rand(1,10));   % plot the first data set to the first plot
hold on             % hold the plot
plot(rand(1,10));   % plot the second data to the first plot
subplot(2,1,2);     % open up the second plot
plot(rand(1,10));   % plot the third data set to the second plot

In Matlab, these commands to exactly what I want. In Octave, however,  
the second plot contains all three data sets instead of only the  
third set. I also tried to sepearate the plots into two different X11  
windows instead of two subplots (using 'figure(1)' and 'figure(2)'  
instead of the subplot commands above). Same problem.

Where's my mistake?

Is there a way to make my code 'universal' such that it runs as  
intended both with Matlab and Octave?

Matthias


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Matthias Brennwald
Lägernstrasse 6
CH 8037 Zürich
+41 (0)44 364 17 03
address@hidden