Error when plot3 is used: vectors must be of same length

Question

Athira Surendran 2017-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/332493-error-when-plot3-is-used-vectors-must-be-of-same-length

编辑： Athira Surendran 2017-3-29

在 MATLAB Online 中打开

Hi,

I want to plot all the fft plots in a single figure. something like the attached image

Here's my code

for i=1:m
    [f(i,:) mag(i,:)]=fftplot(2000000,corr_amp(i,:));
end;
plot3(f,load,mag);

when i used plot3 it is not coming as in the image

Can someone help me to figure it out?

Athira

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Answer 1

Jan 2017-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/332493-error-when-plot3-is-used-vectors-must-be-of-same-length#answer_260829

The error message is clear: f, load and mag do not have the same size. Because f and mag should have the same size, I guess that load is the problem.

Please check its size. Perhaps a simple transpose() is enough. But if other operations are required, you have to explain at first, what you want to happen with the values of load.

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Athira Surendran 2017-3-29

编辑：Athira Surendran 2017-3-29

Hi, What i need is to stack the fft plots corresponding to each load values. So basically each rows of 'f' corresponds to fft plot at each values of load. The 'load' is row vector. Number of columns in 'load' is same as number of rows in 'f' and 'mag'( where mag is nothing but the magnitude of fft).

and yes i tried with transpose(load) also, but still its not working.

As you said 'mag' and 'f' are having same size.

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