[R] subset dataframe based on rows

[Lei Jiang]

I want to subset the dataframe based on certain values in a row.

for each row in my dataframe
	if ANY one value of a particular set of columns satisfies cond
		append a logical value true at the end of the row
	else
		append a false at the end of the row

in the end I want to be able to subset the whole data based on the
appended true or false value.

I could literally code like this, but I think there must be a better way
to do this. Can someone give me a hint?? thanks.

Lei

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