I have a .CSV file having time domain signal data . But I want to plot it in frequency domain. How to do that using MATLAB ?

I have a .CSV file having time domain signal data . But I want to plot it in frequency domain. How to do that using MATLAB ?

Answer 1

[Walter Roberson]

csvread() the file. Then follow the first example in the fft() documentation, as it shows how to construct the plot labels.

You will need to know what the sampling frequency of the signal is.

[Yogesh Nadarge]

Hi Walter Roberson,

Can you please share your code with me ?

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/fft.html#buuutyt-7

[Yogesh Nadarge]

Hi,

I am attaching my .csv file which is having time data (in microseconds)in first column & amplitude data in second column. Can anybody help me to plot a frequency spectrum of this data. Your help will be much appreciated as I am new to FFT.