I am generating a matrix "allpowpf" which shows the power generated as a function of wave slowness and frequency. When I double click on the matrix under the variable listing, it shows a matrix filled with numbers on the magnitude of e10 (screenshot attached). However, when I type "powpf" into the command window, it shows a matrix filled with zeros (screenshot attached). Most importantly, when I plot allpowpf using imagesc, I get an image of an array of zeros instead of the proper numbers.
I generate the zero matrix allpowpf using:
allpowpf = zeros(np,nf/2);
Then, I fill allpowpf using the following:
Y = fft(taup(k,:));
for j = 1:nf/2 % samples in frequency domain, stop at Nyquist
allpowpf(k,j) = allpowpf(k,j) + real(Y(j)^2);
end
And finally, I plot allpowpf using:
imagesc(allpowpf) % plot of energy slowness and frequency
xlabel('frequency (Hz)')
ylabel('slowness (ms/m)')
I believe that my loops are working correctly because the variable allpowpf is correct, but I do not understand why it plots as a zero matrix or why it appears in the command window as a zero matrix when it is not a zero matrix as a stored variable.
