How do I change my scalars to fit my normpdf?

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Leyton
Leyton 2024-9-9
编辑： Torsten 2024-9-9
Here's my code (I am not using the normpdf function because the problem specifically asks to write out the whole equation to get the answer)
e = 2.7183;
xq = 0:100;
mu = [25, 50];
sigma = [5, 10];
figure(3)
for ii2 = 1:length(xq)
ndist=(1/(sigma*sqrt(2*pi)))*power(e,-(1/2)*(power(xq-mu)/sigma),2)
subplot (2,1,ii2)
bar(ndist)
end
  2 个评论
Torsten
Torsten 2024-9-9
Please explain what you are trying to do. I can't deduce it from your errorneous code.
Leyton
Leyton 2024-9-9
I am trying to plot 2 normal distributions using the parameters above the for loop

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Torsten
Torsten 2024-9-9
编辑：Torsten 2024-9-9
Ran in:
xq = 0:100;
mu = [25, 50].';
sigma = [5, 10].';
ndist = 1./(sigma*sqrt(2*pi)).*exp(-((xq-mu)./sigma).^2);
plot(xq,ndist)
grid on
  2 个评论
Leyton
Leyton 2024-9-9
Thank you so much! This is much cleaner than what I typed for sure
Torsten
Torsten 2024-9-9
编辑：Torsten 2024-9-9
Ran in:
Note that "mu" and "sigma" are column vectors and "xq" is a row vector.
Thus "pdist" will come out as a matrix:
xq = [1 2 3];
mu = [3 4].';
sigma = [2 9].';
(xq - mu)./sigma
ans = 2x3
-1.0000 -0.5000 0 -0.3333 -0.2222 -0.1111
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This is already "advanced" MATLAB. Alternatively, you should try to produce "pdist" using a loop.

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