how to solve and plot complex equation

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Heather
Heather 2024-2-12
编辑： Walter Roberson 2024-2-12
Trying to plot the bottom equation where x is 0-180 degrees. I believe the sin within the [] of the sin is where I'm messing up.
a=(b*Pi*sin(x))/c
b and c are constants
x=0-180 degrees
y=(sin^2(a))/a^2

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VBBV
VBBV 2024-2-12
Ran in:
b = 3; c = 4;
x=0:180;
a=b*pi*sin(deg2rad(x))/c;
y=(sin(a).^2)./a.^2;
plot(x,y)

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Austin M. Weber
Austin M. Weber 2024-2-12
编辑：Austin M. Weber 2024-2-12
Ran in:
A couple of things: pi needs to be lowercase and you need to use .*, ./, and .^ when doing element-wise operations on vectors or matrices. I hope this helps!
a = 2;
b = 3;
c = 4;
x=0:180;
a=(b*pi*sin(x)) ./c;
y=(sin(a).^2) ./ a.^2;
plot(x,y)
  1 个评论
Heather
Heather 2024-2-12
Sorry that wasn’t my exact code above, but you fixed my issue anyways. I did have the P capital and I had a missing (). Thank you so much, this is my first experience with matlab and it’s been years since I used Mathematica.

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