add frequency scale for mesh

I want to display the frequency scale ( 0:1:10 ) on y-axis for the following code:

   x=peaks;
    f=10; % freq 
    fval=0:1:f;
    mesh(x)
    set(gca,'Ydir','reverse')
    ylabel('freq. Hz')
    xlabel('Samples')
    zlabel('Amp.')

Answer 1

[Star Strider]

This works:

x=peaks;
f=10; % freq
fval=0:1:f;
mesh(x)
set(gca,'Ydir','reverse')
ylabel('freq. Hz')
xlabel('Samples')
zlabel('Amp.')
yt = get(gca,'YLim');                                                       % Get Y-Limits Values
dyt = 0:10;                                                                 % Desired Y-Tick Values
set(gca, 'YTick',linspace(min(yt),max(yt),length(dyt)), 'YTickLabel', dyt)  % Set New Labels

[MOHAMMED AL-DALLAL]

Thanks for replay but when i select any location in figure will show me the old scale as in following photo :

[Star Strider]

If you want the ‘1:10’ scale to show up on the tooltips, you have to define your y-axis as ‘1:10’, and create it with the meshgrid function.

This should do what you want:

x=peaks;
f=10; % freq
fval=0:1:f;

xv = 0:size(x,2)-1;
yv = linspace(0, 10, size(x,1));
[X,Y] = meshgrid(xv, yv);

mesh(X, Y, x)
set(gca,'Ydir','reverse')
ylabel('freq. Hz')
xlabel('Samples')
zlabel('Amp.')
grid on

[MOHAMMED AL-DALLAL]

its perfect thank you very much , last asking if i want to change the scale for x-axis ? as example x scale from 0 to 20 ?

is it correct xv = linspace(0, 20, size(x,2));

[Star Strider]

My pleasure. (Sorry, had to be away for a bit running errands. Life intrudes.)

You ‘xv’ assignment will work as you wrote it, and will do what you want in the meshgrid call:

xv = linspace(0, 20, size(x,2));