contour Subscripted assignment dimension mismatch

Hi,

Im trying to add isobars to a plot but i get this error. Subscripted assignment dimension mismatch. I haven't used contour before, but according to the documentation X+Y are equal to Z so i came up with this:

frequency    = [7.5 15 30 60 120 240];
nfrequencies = numel(frequency)
duration = 0.5:0.5:8.5;
% for itr see attached file
[X,Y] = meshgrid(1:1:nfrequencies,duration');
contour(X,Y,itr,frequency,'ShowText','on');

[edit]

it should look something like this but this is with fake data. Don't mind the coloured lines:

the itr.mat file contains the data i wanna use for this

[Walter Roberson]

What is frequency? Should it be nfrequencies ?

[Image Analyst]

And should 0.5:0,5:8.5; be really 0.5:0.5:8.5;???

[Jacco vD]

Sorry for that, I was kinda in a hurry to catch my bus yesterday, Hoped to have the question ready so i might have an answer at the start of this day. Didn't look it over to see what for a mess it was.

But i fixed the code and added the data.

hope you guys stil wanna help me out here:)

[Walter Roberson]

That is a line plot, not a contour plot.

I do not have any difficulty plotting with the data you supply. Not a lot shows up, just a single region, but it works.

Please show the complete error message you encounter, everything in red. Also please show the output of

which -all contour

[Jacco vD]

thx for the help, but i its is already fixed. The figure i posted as an example is actually correct.