store the output of a for loop in an array

Hi everyone... I want to store the output of 'q' in an array from the following code:

F= @(x) (cos(x))./sqrt(1+sin(x));
for n=0:0.1:pi/2
    q = quad(F,0,n)
end

I tried to use q(n) instead of q but it gives me an error. Thanks for your time and help!

Answer 1

[Oleg Komarov]

I did not preallocate (up to you)

F = @(x) (cos(x))./sqrt(1+sin(x));
n = 0:0.1:pi/2;
for ii = 1:numel(n)
    q(ii) = quad(F,0,n(ii))
end

You were not able to use q(n) directly because n in that case should indicate which position in q the result should be allocated to. There's no such a thing as position 0.1 and the counting reference starts from 1, thus no position 0 either.

Formally stating, an array can be indexed with positive integer values: 1,2,... etc

Answer 2

[Thomas]

try

F= @(x) (cos(x))./sqrt(1+sin(x));
count=1;
for n=0:0.1:pi/2
    q (count)= quad(F,0,n);
    count=count+1;
end

q

Answer 3

[Andrei Bobrov]

q = arrayfun(@(n)quad(@(x)cos(x)./sqrt(1+sin(x)),0,n),0:0.1:pi/2);