Re: [R] Library chron

2011-10-26 Thread hchui
if else worked. many thanks. -- View this message in context: http://r.789695.n4.nabble.com/Library-chron-tp3935969p3939374.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/

Re: [R] Library chron

2011-10-25 Thread R. Michael Weylandt
I think you mean to use if instead of ifelse (and you should probably read briefly on the difference between them: if is the regular programming construct: ifelse is a vectorized thing) if(length(theData) == 0) t0 <- t0 else t0 <- theData which can be more expressly written as t0 <- if(length(th

[R] Library chron

2011-10-25 Thread hchui
Hi there, I have the following problem using times() and ifelse(). t0 <- c(rep("NA", 7)) theData <- times(c("07:36:00","08:09:00","10:28:00","13:28:00","16:29:00", "19:30:00","22:29:00")) t0 <- ifelse(length(theData)==0, t0,theData) In this case, R gives this, instead of theData: > t0 [1] 0.316