How do I product elements of a vector?

Hi,

I have this matrix (3000 by 2) and I want the product of a range of elements in the second column. All of the elements are equal to 0.99 in a initial stage, but its gonna change after some further steps. I tried to use 'prod' but it didn't work...

Ex. matrix named 'aux'

prod(aux(2500,2):aux(2700,2)); It always returns me 0.99 no matter the range...

How do I do it?

tks

[Azzi Abdelmalek]

Give a small example with expected result

[cfjunior]

or example:

A = [71 2; 72 2; 73 2; 74 2; 75 2];

and I want the product of the second element till fourth element (in sequence)

so, I want 2 x 2 x 2 = 8 ...

[cfjunior]

I got it, thanks!

Answer 1

[Azzi Abdelmalek]

A = [71 2; 72 2; 73 2; 74 2; 75 2];
prod(A(2:4,2))