To find integral of a function in loop
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Hi,
I am calculating integral of a function 'f' with respect to lamda. I want to calculate variable 'q' for all possible values given in range of variable 'x'. upper limit and lower limit of variable lamda is as same as in variable 'x'. But matlab function given an error. kingly ghide me. or matlab show output of a single value. I want to do these calculations as a vector.
x = [600*10^-9:5*10^-9:800*10^-9];
for i = 1:numel(x)
N=(15.*z.*T*((h.*c).^3));
f=@(lamda)((Pi.^4).*(lamda.^4)*(k.^3));
q = integral(f,6e-7, x);
F=(N./q);
end
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Alan Stevens
2021년 7월 6일
Try replacing
q = integral(f,6e-7, x);
with
q(i) = integral(f,6e-7, x(i));
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Alan Stevens
2021년 7월 6일
q holds all the results! For example:
x = [600*10^-9:5*10^-9:800*10^-9];
% Arbitrary data - replace with your own
N=1; %(15.*z.*T*((h.*c).^3));
k = 10^3;
lambda = 10^4;
f=@(lamda)((pi.^4).*(lamda.^4)*(k.^3));
for i = 1:numel(x)
q(i) = integral(f,6e-7, x(i));
F=(N./q);
end
plot(x,q),grid
xlabel('x'),ylabel('q')
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