Hello,

I'm trying to paste two columns of a matrix
GB_ACC    GENE    GENE_SYMBOL
NM_010657    NM_010657
NM_027162    NM_027162
NM_198863    NM_198863
NM_010727    NM_010727

These two column are a part of a 41,000 x 26 matrix.

I wanted these two column to be pasted into one (the firstone, GB_ACC). I
tried to do it with a for loop, but it takes ages to finish:
for( i in 1:length(combined[,15])){
    combined[i,19]<- paste(combined[i,19], combined[i,20], sep = " ")
}

Does anyone has a better idea?
I tried to do it with the apply function, but I'm getting an error message
that paste(...) is not a function.

THX

Assa

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