Given an array of data, is it necessary to use FFT to get the amplitude?

Hello all, I am given an array of data, first column represents the time data and the second represents a sin wave date (using the time data). I need to find the amplitude of the signal, do I need FFT for this? (I would know how to do it, i m just not sure if i need it), or shall I just use amp = sort(abs(2nd column of my array)

I am using Matlab here. Thank you.

Answer 1

[Iain]

Try plotting it and seeing what that tells you...

(max(2nd column) - min(2nd column))/2 might make most sense ;)

[Nina]

Thank you, I will give this a try.