Hi 

I want to do something which seems straightforward, but I couldn't find the 
way to do this. 
I have a matrix called m for example, and a vector of values (let's call ind 
this vector) which are indices of lines I don't want to keep. 

for example I have:

> m
v1 v2 v3
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
[4,] 10 11 12

> ind
[1] 2 4


I would like to obtain this:

> m2
v1 v2 v3
[1,] 1 4 7
[3,] 3 6 9

by saying something like 

m2<-m[!=(ind),] 

but this line does not work. 

Any idea or suggestion highly welcome !

Florence.

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