How to plot phase and amplitude spectrum after doing fft?

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Saptarshi Maji 2020-10-31

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https://ww2.mathworks.cn/matlabcentral/answers/632514-how-to-plot-phase-and-amplitude-spectrum-after-doing-fft

回答： Sindar 2020-11-1

Signal.txt

Hello, I am a new MATLAB user. I had a signal file in .txt which I did Fourier Transform for. I would like to know what code I should input in MATLAB in order to plot the phase and amplitude spectra of this file. Thanks in advance... "The signal txt is atttched herewith"

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Star Strider 2020-11-1

That is not possible to do with any accuracy without having the associated time vector (vector of sampling instants for each sample).

Saptarshi Maji 2020-11-1

编辑：Saptarshi Maji 2020-11-1

Strider, This is the only data given to me by my lecturer in college, I don't need accuracy but can you give me a code that allows this to do the above mentioned program. I know that the data is incomplete, But can you give the specific time vectors by yourself and do the 2 plottings. Take the sample rate of 100samples/second or deltaT = 0.01.

I will be highly grateful.

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