[R] Excluding rows from a matrix

[José Ernesto Jardim]

Hi

I have a matrix (4 x 950) and I want to remove 3 rows, where the values
from the first column are 713, 714 and 715. I can select the rows, one
by one, with

mat[mat$first==713,]
mat[mat$first==714,]
...

but I'm unable to (i) select the 3 rows at once, (ii) select the matrix
excluding those rows.

How can I do it ?

Thanks

EJ

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