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revised: How to set xtics in 2-D plot in Octave 3.0.0 on a PC with Windo


From: Mr. E
Subject: revised: How to set xtics in 2-D plot in Octave 3.0.0 on a PC with Windows Vista
Date: Wed, 27 Feb 2008 14:36:23 -0800 (PST)

I have been using the __gnuplot_set__ xtics  command
for a long time to set non-uniform ticks on the x
axis, particularly handy in marking x-intercepts.

The new version of Octave 3.0.0.0 does not support
this method.  Does anyone know how to do this?

here is a sample program that I have used for many
years to teach xtic setting:

xmin=0.0;
xmax=2*pi;
ymin=-1;
ymax=1;

deltax=(xmax-xmin)/200;

axis([xmin   xmax  ymin ymax]);
x=xmin:deltax:xmax; 
y=sin(x);
plot(x,y)
__gnuplot_set__ xtics ( "Pi/4" pi/4, "Pi/2" pi/2, "Pi"
pi, "3*Pi/2"
1.5*pi, "2*Pi" 2*pi ) 
plot(x,y)


I already tried the suggestion on my PC Windows Vista
with Octave 3.0.0 installation, and the     

set (gca, "xtick", [pi:pi/2:2*pi]);           

command does not change the default tickmarks.

I am a teacher at a small college, and it would really
help my students label their graphs and check handwork
if I could get the NON-uniform tick setting working
again.

Any suggestions welcome.

ps.  My question does not appear on the octave help
page... how can I post this question there for
everyone to see?  

thanks!
Lalu


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