Creating a column vector by multiplying the n-1 element by the corresponding element in another vector

Hello,

I am quite new to matlab so I am hoping this is a simple question. I am trying to create a column Vector (M) where the first element is known (e.g. 1) and then subsequent elements are calculated by multiplying the above element in vector M (x-1) and the corresponding element in another vector (F)(y).

For example:

F=[2;3;4;5;6)

I want M to represent the following

M=[1;3;12;60;360]

I guess it would be something along the lines..

M=[1;M(1,1).*F(2,1);M(2,1).*F(3,1);M(3,1).*F(4,1);M(4,1).*F(5,1)

Am i on the right track?

Answer 1

[Roger Stafford]

You don't need to use a for-loop for this problem. Let the first known element of M be 'a'.

 M = cumprod([a;F(2:end)]);

Answer 2

[sixwwwwww]

Dear Hannah, here is the code as you require:

F = [2;3;4;5;6];
M = [1;3;12;60;360];
new_M = zeros(length(M),1);
for i = 1:length(M)
  if i == 1
      new_M(i) = M(i);
  else
      new_M(i) = M(i-1) * F(i);
  end
end

Good luck!

Answer 3

[Andrei Bobrov]

out = [1;M(2:end).*F(1:end-1)]

Answer 4

[Azzi Abdelmalek]

F=[2;3;4;5;6]
n=numel(F)
M=zeros(n,1);
M(1)=1;
for k=2:n
  M(k)=M(k-1)*F(k);
end
disp(M)