user8102905 - 3 months ago 19

R Question

Having a matrix A like:

`1 21 3 49 59`

21 33 59 67 65

3 5 7 8 11

21 76 5 4 9

I want to get only the rows where there are no 3 or more numbers per row all having between them max difference < 10

this function should return only Row 1.

Answer Source

You cun find the `diff`

of all combinations of values, and use `rowSums`

to filter, i.e.

```
A[rowSums(t(apply(A, 1, function(i)combn(i, 2, diff))) < 10) < 3,]
#[1] 1 21 3 49 59
```