Non-linearly spaced axis

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Keunyoung Kim
Keunyoung Kim on 27 Nov 2020
Commented: Ameer Hamza on 27 Nov 2020
I need to manually create a bode plot with my frequency values of [0.01 0.05 0.1 0.5 1 2 5 10 20 50 100 200 500],
magnitude of [-23.521920 -23.525300 -23.534820 -23.847406 -24.713787 -27.168337 -34.150448 -42.334723 -52.552808 -67.958800 -79.331525 -86.558043 -104.436975],
and phase of [-0.33 -1.90 -2.37 -19.10 -36.71 -60.53 -102.28 -132.75 -152.00 -167.24 -177.14 -198.62 -180.00].
Here is my graph when I plot in on MATLAB:
But I want the x axis to be like how it is in the actual bode plot like this:
ranging from 0.01 to 1000, with non-linear spacing. Can anyone tell me how I can fix this?
P.S. I'm sorry I don't know how to make the images small...

Accepted Answer

Ameer Hamza
Ameer Hamza on 27 Nov 2020
You need to set the xscale to 'log'. Run the following line after creating the plot
xlim([0.01 1000])
set(gca, 'XScale', 'log')
  2 Comments
Keunyoung Kim
Keunyoung Kim on 27 Nov 2020
Thank you so much!
Ameer Hamza
Ameer Hamza on 27 Nov 2020
I am glad to be of help!

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