Re: Help with plotting - major problem with

[Ben Abbott]

On Oct 5, 2012, at 2:14 PM, drugistudent wrote:

> Hi! I'm from Poland and I study at Gdansk University of Technologi - Civil
> Enginerring.
> I've a problem with this task http://i49.tinypic.com/1z6d2xf.jpg - plot in
> MATLAB all lines which are in the picture but I'm using an octave ;)
> I've succesfully plotted straight lines but i've major problem with sinus
> (or tanges,cosinus other function that must be from 0.2 to 0.3,0.01 to 0.06
> etc)
> I'm typing (in blank m-file) :
> 
> t=[1:0.1:9]
> y=sin(t)
> plot(y)
> 
> 
> and octave plot this:
> 
> http://tinypic.com/r/4uc56t/6
> 
> why it's showing my field as t=[10:90]
> this problem apper also in other function, and it's analogy eg. t=[1:0.01:9]
> it shows t as from 100 to 900
> 
> i'm using octave (3.6.2) + xoctave + packages i installed during
> installation
> 
> please help me ;)
> thx in advance

You need to include "t" in the plot.

        plot (t, y)

Ben