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

[Tatsuro MATSUOKA]

Please try

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)
ax=gca()
set (ax, "xtick", [pi/4, pi/2, pi, 1.5*pi, 2*pi])
set (ax, "xticklabelmode", "Manual")
set (ax, "xticklabel", ["Pi/4";"Pi/2";"Pi";"3*Pi/2";"Pi"])

I have not been knwon what I should to do.
The trial-and-error method with the octave manual make it possible.

However, the manual is not frindly, I think.

Regards

Tatsuro 

--- "Mr. E" <address@hidden> wrote:

> 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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