In contourf(), Force a matrix to begin at a specified value on the Y axis

Dear matlab,

I have a matrix that is a 32 X 7 double.

I'm doing cross-frequency coupling with EEG data.

The amplitude range on the Y axis goes from 9:40, and the phase range on the x axis goes from 1:7

The output matrix after running the algorithm = 32 X 7 double.

THE PROBLEM: In controuf(), I want to plot the matrix to begin at amplitude 9, BUT the matrix WANTS to begin at 1, so when I force the y axis using the ylim([]) function, it correctly sets the y axis to 9:40, BUT THE MATRIX STILL WANTS TO START AT 1:32, SO IT STOPS AT 32 AND LEAVES THE TOP PART BLANK/WHITE.

GOAL: force the matrix to begin at amplitude 9 on y axis and go up to 40 and fill the whole plot with beautiful colors

Attached is:

1) the data

2) an example output png image

Please advise.

Thanks very much in advance for your help (as always)!

Joanne

Answer 1

[Voss]

load DataForMatlab

% specify x and y in contourf, increasing y by 8
[m,n] = size(MIcf4);
contourf(1:n,8+(1:m),MIcf4)

[Joanne Hall]

worked like a charm - thank you!!!

[Voss]

You're welcome!