How to Build matrix in R -
i have samples a:z , want make matrix have sample column , value column 1's.
result should this.
samples values 1 b 1 c 1 d 1 . . . . z 1
use cbind
create matrix
cbind(samples, values=1)
but matrix
can hold single class
output columns 'character'
i suggest use data.frame
hold columns of different class.
data.frame(samples, values=1)
if want 'samples' column character
class, use option stringsasfactors=false
. default true
.
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