How to replicate elements in a vector (matlab)?

Asked Nov 25 '14 at 15:44

Active Nov 25 '14 at 15:44

Viewed 31 times

so I have a situation where I need to duplicate elements in a vector. So for example, I have a column vector A = [1,0,1,1,0,1,1]' and I want to duplicate each element 100 times, so I want to end up with [1,1,1,1,1,1....(100th one),0,0,0,0,0,0,0,0,0...(100th zero).........]', you get the idea. My original idea was to make an empty vector say B = []', then create a loop which goes through the elements in A then inserts them into B, if that makes sense?

B = []'
A = [1,0,2,1,1,1,0,1]' 
for i = 1:length(BS)
    B = B + A(i)*100
end

I know this is wrong, I just can't find out how to do this, I know you guys hate questions like this but I honestly have looked every where and can't find an answer. Any help will be appreciated, thanks.

asked Nov 25 '14 at 15:44

MathsIsHard

1

Try this - `reshape(repmat(A',[100 1]),1,[])` – Divakar Nov 25 '14 at 15:46
2

Or B = kron(A,ones(100,1)) – Benoit_11 Nov 25 '14 at 15:48
1

Or `B = A(ceil(1/100:1/100:numel(A)));` – Luis Mendo Nov 25 '14 at 15:49
1

Thanks so much for the answers guys, I'll stick with @Benoit_11 method, I think it's quite elegant ^^ – MathsIsHard Nov 25 '14 at 15:56
2

@Benoit_11 Make sure to post that as an answer! – Divakar Nov 25 '14 at 15:56
1

@Divakar Oops I can't since it's a duplicate... of a duplicate haha that's kind of funny :) – Benoit_11 Nov 25 '14 at 16:02
1

@Benoit_11 Damn that name also starts with `duplicating`..! – Divakar Nov 25 '14 at 16:04

How to replicate elements in a vector (matlab)?

0 Answers0