help-octave
[Top][All Lists]

## RE: contourc - Octave vs Matlab

 From: Big Muscle Subject: RE: contourc - Octave vs Matlab Date: Sun, 5 Apr 2009 00:00:08 +0200

```I don't have simple example, but I can provide you report from Octave's
diary in an attachment.

And Matlab provides following contour matrix:

c =

Columns 1 through 11

1.0804   -5.6250   -5.9210    1.3143   -5.2871   -5.6250    1.0804
4.8132   -6.8916   -6.4375   -5.9388
5.0000    0.4556   10.2554    5.7364    9.1575    0.4556    5.0000
-4.6545  -11.9367         0  -10.2863

Column 12

4.8132
-4.6545

You can see that it is different. Octave generates one closed contour at
level 1.0804, but matlab generates two contours.

(I hope I'm responding to correct e-mail, I have never used mailing lists)

-----Original Message-----
Sent: Saturday, April 04, 2009 11:36 PM
To: Big Muscle
Subject: Re: contourc - Octave vs Matlab

On Apr 4, 2009, at 1:03 PM, Big Muscle wrote:

> Hello.
>
> Is Octave's contourc algorithm supposed to produced exactly same
> contours as Matlab algorithm? I would like to use Octave's source
> code to my application, but it doesn't provide same result as
> Matlab. The difference is that Matlab draws some countours at same
> level as two different contours, but Octave draws it as one.
>
> I also tried to use PLPlot algorithm, but it has completely inversed
> problem - it sometimes draws two closed contours where Matlab draws
> only one closed contour.
>
> I think my problem has something to do with saddle points where both
> algorithms use different techniques to choose which edges to connect.
> Is there something to do with this? Thank you!
>
> Tomas

I'm confused as to the specifics. Can you provide a simple example
illustrating the difference between Octave and Matlab?

Ben

```

diary
Description: Binary data