0 个投票

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.')

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Star Strider
Star Strider 2016-5-23

0 个投票

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

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MOHAMMED AL-DALLAL
MOHAMMED AL-DALLAL 2016-5-23
Thanks for replay but when i select any location in figure will show me the old scale as in following photo :
Star Strider
Star Strider 2016-5-23
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
MOHAMMED AL-DALLAL 2016-5-23
编辑：MOHAMMED AL-DALLAL 2016-5-23
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
Star Strider 2016-5-23
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));

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