FFT on matrix dataset

How do I calculate fft on the matrix dataset (M1.mat) and plot it?

Answer 1

[KALYAN ACHARJYA]

data_mat=load('filename.mat');
fft_result=fft(data_mat)

Please carefully check the size and details of the loaded mat file.

See the Matlab Doc FFT function here

Plot, hope you can do that

If variable are 1 D

Use plot()

2D Variable See the surf function

There are multiple ways of data visualization (plot function), check the dimentions of the plot variables and plot accordingly as per your requirement.

[sri ram]

the resultant fft for M1.mat has Naan+Naani as elements. Why is that?

[KALYAN ACHARJYA]

NaN: Not a Nmber

https://in.mathworks.com/help/matlab/ref/nan.html