Displaying 1 result from an estimated 1 matches for "rothehausstr".
2012 Dec 04
3
How to find matching columns in a matrix of lists?
Dear R users,
I have a matrix composed of lists:
m <- matrix( list(), nrow=1, ncol=3 )
m[[ 1, 1 ]] <- list("A", "B")
m[[ 1, 2 ]] <- list("A", "C")
m[[ 1, 3 ]] <- list("A", "B")
and want to get the sub-matrix where cells contain "B".
But
m[ , "B" %in% m[ 1, ], drop=F ]
as well as
m[ , "B"