Need help with factorizing array of numbers

hi there,

say you have an array of numbers x =[94 89 124 120 150] how can i find factors of this array, i mean break each number in the array to its primes. i know the function is factor(x). but it only applies to a scalar value not an array. i tried putting it on a loop

x =[94 89 124 120 150] ;
for i = 1:length(x)
 facts_x(i) = factor(x(i))
end

but this i realized gives me an error because the loop runs only in the length of x the facts_x ends up bigger because factor answer is stored as an array. please help. thanks SN

[José-Luis]

Try storing it in a cell array instead:

 facts_x(i) = {factor(x(i))}

Answer 1

[Azzi Abdelmalek]

You need to use a cell array to store the result for each number, because they are not the same length

x =[94 89 124 120 150] ;
out=arrayfun(@factor,x,'un',0)
out{:},

[Jan]

I'd prefer the explicit loop:

facts_x = cell(1, lenghth(x));
x =[94 89 124 120 150] ;
for k = 1:length(x)
  facts_x{k} = factor(x(k));
end

But the result is equal. The runtime will be comparable also, because the main work happens inside factor.

[Azzi Abdelmalek]

Please, don't add an answer as a comment , click on comment this answer and add your comment.

[Azzi Abdelmalek]

Did you notice that your results have different sizes

The first result is [2 47]

The second result is 89

Tell how to put them in one matrix?

[Jan]

@Azzi: Do you meant me with "don't add an asnwer as a comment"? Or did you meant the OP and "don't add a comment as an answer" instead?

I've added my code as comment, because it does exactly the same as your asnwer. Therefore this is nothing new.

[Azzi Abdelmalek]

Jan, sorry for the confusion, I should have mentioned the name of the OP. I meant: don't add a comment as an answer.

Answer 2

[Ahsan Khan]

thanks for a quick reply. they both work but In either of those cases mentioned above how do i then store this in a single matrix?. thanx in advance. SN