Displaying 1 result from an estimated 1 matches for "tp2236334p2236388".
2010 May 30
3
subsetting
Hi,
I have a data-frame, r (column names below), that needs subsetting:
date, time, strain, gene, deltact
When I try to subset r by applying selection criteria on two columns I get
an empty data frame. For example I would like to extract all rows that have
time == 0h and strain == ROC.
So, t <- subset(r, (r$time == "0h" && r$strain == "ROC"), select= c(time,