Re: problem about plotting

[Ben Abbott]

On Nov 13, 2009, at 12:49 PM, Jerry Wu wrote:
> 
> On Nov 13, 2009, at 6:07 AM, Ben Abbott wrote:
> 
>> On Friday, November 13, 2009, at 04:33AM, "Jerry Wu" <address@hidden> wrote:
>>> Hi I have problem plotting the graph,
>>> It shows me the message:
>>> 
>>> octave-3.2.3:4>
>>> multiplot> set palette file "-" binary record=64 using 1:2:3:4;
>>>                                                             ^
>>>          line 0: Gray scale not sorted in gradient.
>>> 
>>> 
>>> I use:
>>> Mac OS 10.5.8
>>> 
>>> GNU Octave, version 3.2.3
>>> Octave was configured for "i386-apple-darwin8.11.1".
>>> 
>>> G N U P L O T
>>>     Version 4.2 patchlevel 6
>>>     last modified Sep 2009
>>>     System: Darwin 9.8.0
>>> 
>>> X11 - 2.3.2
>>> 
>>> So how can I fix the problem?
>>> 
>>> Thanks a lot!!!
>> 
>> Can you provide us with a simple example so that we may duplicate the 
>> problem?
>> 
>> Ben
> 
> 
> I use simple equations like
> 
> x=0:90;
> plot x = sin(x)
> 
> or from the sample from octave "help plot"
> 
>  t = 0:0.1:6.3;
>          plot (t, cos(t), "-;cos(t);", t, sin(t), "+3;sin(t);");
> 
> Thanks.

The first isn't proper octave syntax. Did you mean ...

        x = 0:90;
        plot (x, sin(x))

That works fine with  no error.

Your 2nd example also works. 

When you try these two examples do they produce the message below?

>>> multiplot> set palette file "-" binary record=64 using 1:2:3:4;
>>>                                                             ^
>>>          line 0: Gray scale not sorted in gradient.
>> 


Ben

p.s. please bottom post so that other may follow along, and take care that you 
reply-all. Thanks!