Hello all,

I am working with a large matrix, but I am only interested in keeping the nth largest values of every row, making the rest of values equal to 0.

I will use a simple example:

```
n = 5 # Number of dimensions
A = matrix(runif(n^2), n) # Random matrix example
```

How could I keep the largest `k=2`

values of every row, while making the rest of values equal to 0 ?

Thanks in advance for any help!