How do I create a smaller matrix out of a larger dataset?

Asked Jun 19 '18 at 22:17

Active Jun 19 '18 at 22:17

Viewed 45 times

Say I have a matrix

  1 2 ~ 80
a x x x x
b x x x x
~ x x x x
z x x x x

and I would like to make a smaller matrix out of a, b, and r/ 3, 5, 7, 8. How would I go about restriction the matrix to just

  3 5 7 8
a x x x x
b x x x x
r x x x x

I am attempting to restrict a gene matrix in R

asked Jun 19 '18 at 22:17

T fish

`mat[, c(3, 5, 7, 8)]` or ... – Maurits Evers Jun 19 '18 at 22:24
2

... or `mat[c("a", "b", "r"), c("3", "5", "7", "8"]` perhaps? – markus Jun 19 '18 at 22:25
I am getting an error about incorrect number of dimensions. – T fish Jun 19 '18 at 22:37
Describe better what exactly you need. – mentallurg Jun 19 '18 at 23:16

0 Answers0