Fourier transform and FFT for an arbitrary plot using MATLAB

Dear all, I have a simple problem but since I have not used MATLAB Fourier Transform tools I need some help. I have a plot obtained from n excel file. The plot is in time domain. Time range for the plot is 0 to 50 ps. And I have data for the y component of the plot every 0.5 fs. Basically the plot contains 100000 data printed every 0.5fs. Now I want to get the Fourier transform of this plot. What should i do? The following is a simple format for my excel file that includes the data I needed to have the time-domain plot.

    0  116.0080214
0.0005  116.051128
0.001  116.0939229
0.0015  116.1362197
0.002  116.1776665
0.0025  116.2178118
0.003  116.256182
.
.
.
.
50.0    123.000

The first column is time in ps. Thank you so much in advance for you helps. Best, HRJ