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How to enter a function into MATLAB

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Nicholas Deosaran
Nicholas Deosaran on 17 Sep 2020
Commented: Walter Roberson on 17 Sep 2020
Hello good day,
I am having issues on how to enter this equation into MATLAB.
I have it as
H/2 * cos(k*x)*cos(sigma*t)
but getting a different answer from my calculator
Thank you

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Answers (1)

Steven Lord
Steven Lord on 17 Sep 2020
Is your calculator computing the cosine of angles in degrees (which in MATLAB is the cosd function) or in radians (cos)?

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Nicholas Deosaran
Nicholas Deosaran on 17 Sep 2020
I did it in radians and degrees and got different answers.
Am I tryping out the code corretly in MATLAB?
I don't know if I need to put the .* in the function.
Walter Roberson
Walter Roberson on 17 Sep 2020
If your inputs are all scalars then you can use either * or .*
If your inputs are not scalars, then you need .*

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