Bug in quiver

[Jaroslav Hajek]

On Fri, Jan 16, 2009 at 6:20 PM, Steven Verstoep <isgoed at hotmail.com> wrote:
> Hi all,
>
> A Bug in octave just wasted a day of my work:
>
> [x, y] = meshgrid (1:12,1:9);
> % passes:
> quiver (x, y, sin (2*pi*x/10), sin (2*pi*y/10));
> % fails:
> quiver (sin (2*pi*x/10), sin (2*pi*y/10));
>
> I found a way to solve this. First I completely wrote my own quiver plot,
> finding  it yielded the same results. I've found that it is because of the
> inconsequent way (Matlab legacy?) columns and rows are accessed:
>
> [y x] = size(M) # <- Annoying X,Y makes sense!
> columns = x;
> rows = y;
>
> In the file __quiver__.m line 43 change
>
> [x, y, z] = meshgrid (1:size(u,1), 1:size(u,2), 1:max(size(w)));
>    else
> [x, y] = meshgrid (1:size(u,1), 1:size(u,2));
>
> to
>
> [x, y, z] = meshgrid (1:size(u,2), 1:size(u,1), 1:max(size(w)));
>    else
> [x, y] = meshgrid (1:size(u,2), 1:size(u,1));
>
> restart octave
>
> Already for 2 weeks I am trying to make a scientific plot. Opensource really
> should get their act together if they want to be a serious alternative for
> commercial software. This is the 2nd time I have to subscribe to this
> mailing list. I am reporting this just for your information, since I already
> solved my problem.
>
> regards,
>
> Stever

...had you omitted the last paragraph, it would even have been a
fairly good bug report :)

cheers

-- 
RNDr. Jaroslav Hajek
computing expert
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz