search for: t2freq

Displaying 2 results from an estimated 2 matches for "t2freq".

Did you mean: t1freq
2006 May 02
0
Enquiry regarding Apply
I want to compute a new variable (newvar) based on the values of two other variables (t1freq, t2freq).The two variables (t1freq,t2freq) are contained in a dataframe - study1dat <- read.csv("c:\\study1rb.csv",header=T) . I gather this computation can be done using Apply and I have run the following example from the help menu ## Compute row and column sums for a matrix: x &...
2006 May 08
1
performing functions on variables of different length
...case: length(outcome) [1] 368 > length(grp) [1] 184 > length(subject) [1] 92 > length(time) [1] 184 Below is the syntax I have been using and the date frame that I generated - study1dat <- read.csv("c:\\study1rb.csv",header=T) attach (study1dat) outcome <- c(t1freq, t2freq,t3freq,t4freq) grp <- factor( rep(group, 2) ) time <- gl(4, 46) subject <- gl(46,1,92) data.frame(subject, grp, time, outcome) subject grp time outcome 1 1 0 1 4 2 2 0 1 3 3 3 0 1 7 4 4 0 1 0 5 5 0...