I want to take modulus of complex number in polar coordinates in matlab .
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For examle how to calculate mod of 1+ a cos(theta)+ i asin(theta) on matlab
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Bjorn Gustavsson
am 10 Aug. 2021
The only definition of modulus of a complex number I can find is what is done with the abs-function. In that case you simlpy do:
z = 1+a*cos(theta) + 1i*a*sin(theta); % using 1i to make sure it is the imaginary unit.
abs(z)
Here I also assumed that you wanted a*sin(theta) and not 1i*asin(theta)
HTH
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Bjorn Gustavsson
am 11 Aug. 2021
No it doesn't:
a = 12;
theta = sqrt(2);
z = 1+a*cos(theta) + 1i*a*sin(theta); % using 1i to make sure it is the imaginary unit.
abs(z)
ans =
12.1960
As it should. If you're working with symbolic variables then that's another case which you might not get further, but why bother about that, you know what it should be and can simply replace (see help and documentation for subs) it when necessary.
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