PColor: Why doesn't it work for non-evenly distributed x-vectors?

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I have an unevenly distributed x (time) and y vector and a matrix C with size(x,y). When I plot it with pcolor, the plot looks all weird but the y-axis looks fine. Why can it cope with non-evenly distributed y values but not with non-evenly distributed x values? What can I do to solve this?
best regards, Bernadette
  1 Comment
Paul
Paul on 1 May 2014
I think this is a problem with pcolor and a time axis rather than unevenly distributed data. I have an evenly distributed matrix of ocean velocity as a function of time (x axis) and depth (y axis). If I use pcolor(time,depth,velocity) the result is similar to yours - the first half of the plot is missing. If I create an artificial x variable (x=1:length(time)) and use pcolor(x,depth,velocity) the plot looks fine.

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Answers (3)

Kelly Kearney
Kelly Kearney on 1 May 2014
That's the opengl renderer acting up... quick fix:
set(gcf, 'renderer', 'zbuffer');
More complicated fix:

Walter Roberson
Walter Roberson on 6 Jan 2014
Did you try
axis equal
?

Bernadette
Bernadette on 6 Jan 2014
No, unfortunately this doesn't make it better. By writing "axis equal" the plot is somehow shrinked to a small vertical line. But maybe I was not clear enough:
so my code looks like this: pcolor(time,GF,GF_500');
where time is a non-evenly distribted vector GF as well and GF_500 is a matrix with size(GF,time)
unfortunately the graph then looks like this?!

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