how can I change y-axis without changing figure' values?

Hi,

I have a figure_#1 given here. However, I want to have Figure_#2. I want to change only numbers of y-axis without changing anything (see red colour!). Can you please help me with that ? Thanks.

This is what I used.

figure;
imagesc(t,f, ST_normalized)

Answer 1

[Walter Roberson]

imagesc(t, fliplr(f), ST_normalized)
ax = gca;
ax.YDir = 'normal';

[Adnan]

thanks a lot sir @Walter Roberson. It worked.