How to write a matlab-function which counts the n! with help of a vector?

If we call n=4, the answer should be a vector equaled to [1! 2! 3! 4!]. If we do like this

function [f]=nfac(n)
h=1
 for i=1:n
     h=h*i
  end;
end

we will get a number when we call the function , but how should u do if u want a vector?

Answer 1

[Roger Stafford]

function f = nfac(n)
f = [];
h = 1;
for k = 1:n
  h = h*k;
  f = [f,h];
end
return

Answer 2

[the cyclist]

The most straightforward extension of the code you have written is probably this ...

function [f]=nfac(n)
h = zeros(1,n);
h(1)=1;
 for i=2:n
     h(i)=h(i-1)*i
  end;
end

There are more efficient ways. Hints:

• This can be vectorized
• MATLAB has a function for calculating the factorial function