Hi,
I've got some boolean data in a data.frame in the form:
X Y Z A B C
[1] T T F T F F
[2] F T T F F F
.
.
.
What I want to do is create a new column which is the logical disjunction of
several of the columns.
Just like:
new.column <- data$X | data$Y | data$Z
However I don't want to hard code the particular columns into the expression
like that. I've tried using apply row wise with `|` as the function:
columns <- c(X,Y,Z)
apply(data[,columns], 1,`|`)
This doesn't seem to do what I would have expected, does anyone have any
advice how to use the the apply or similar function to perform a boolean
operation on each row (and a specific subset of the columns) in a data
frame?
Thanks,
Alastair
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