search for: expandedcondition1

...ion2 <- data.frame('dates' = rep(c('2003-07-06','2007-03-11'),8000)) First, my instinct is to try and vectorize the operation. I tried this by expanding each vector into a matrix of repeated vectors (I'd then just subtract the two). I got the following error: > expandedCondition1 <- matrix(rep(Condition1[[1]], nrow(Condition2)), byrow=TRUE, ncol=nrow(Condition1)) Error: cannot allocate vector of size 732.4 Mb > expandedCondition2 <- matrix(rep(Condition2[[1]], nrow(Condition1)), byrow=FALSE, nrow=nrow(Condition2)) Error: cannot allocate vector of size 732.4 Mb Sin...