r - How to Remove any row with "." in it? -


in following example, want remove row "." in row names 

data<-matrix(nrow=10,ncol=3,1)  rownames(data)<-c("a.1","b.2",letters[3:10])

i have tried grep that:

data[( grepl(".", rownames(data))), ]

but, think there missing here. appreciate thanks

'.' matches character needs escaping.

data <- matrix(nrow=10, ncol=3,1) rownames(data) <- c("a.1", "b.2", letters[3:10])  data[!grepl('\\.', rownames(data)), ]    [,1] [,2] [,3] c    1    1    1 d    1    1    1 e    1    1    1 f    1    1    1 g    1    1    1 h    1    1    1    1    1    1 j    1    1    1

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