saving from for loop

Question

Jakub 2011-12-21

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/24517-saving-from-for-loop

Hi guys

I have an array a and b. I want to divide all of the elements from row 1 of array a by the first element from array b and all of the elements from row 2 of array a by second element from array b etc.

Here is an example and what I wrote: a = [1,2,3,4;5,6,7,8;9,10,11,12]; b = [50,60,70];

c = zeros(size(a));

for i=1:length(b)

c(i) = a(i,:)./b(1,i)

end

It does not work and the eror is: In an assignment A(I) = B, the number of elements in B and I must be the same.

Error in try (line 7) c(i) = a(i,:)./b(1,i).

Second thing, I wanted to pre locate the space for results so I used zeros function; is that the best way to allocate space for result from for loop and did I use it correctly in that case?

Thanks in advance jakub