How to store output of a for loop in a matrix?

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Jamil Dudhwala
Jamil Dudhwala 2019-2-18
评论： madhan ravi 2019-2-18
Hi guys,
I'm having difficulty storing my output values from a loop into a matrix. And whenever I try the solution mentioned in other examples the error preallocate comes up.
My code is below:
P= [10 20 30]
A=1230
B=0.14
Idir=0
for index = 1:3
Idir=(A/(exp(B/sin(P(index)))))
end

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madhan ravi
madhan ravi 2019-2-18
Idir=zeros(size(P)); % this is how you preallocate before loop
Note: In this case you don’t need a loop.
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Jamil Dudhwala
Jamil Dudhwala 2019-2-18
Thank you, that worked.
But in that case, in MATLAB, when should for loops be used?
madhan ravi
madhan ravi 2019-2-18
Definitely I would suggest you to read the link suggested by stephen , once if you get familiarized with all the functions then you will know
When to use it ?
How to use it ?
Where to use it ?

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