# Repeat each row of matlab matrix

## Alec Jacobson

## February 16, 2016

I swear I've posted this before, but here's how to turn:

```
X = [11 12 13; ...
21 22 23];
```

Into:

```
Y = [
11 12 13; ...
11 12 13; ...
11 12 13; ...
11 12 13; ...
21 22 23; ...
21 22 23; ...
21 22 23; ...
21 22 23];
```

That is, repeat each row, but maintain the order

```
Y = reshape(permute(repmat(X,[1 1 num_reps]),[3 1 2]),[],size(X,2));
```