search for: pat4

Hi, I'm fairly new to R but I have a large dataset (300000 obs) containing patient material. Some patients came 2-9 times during the three year observation period. The patients are identified by a unique idnr, the sessions can be distinguished using the session date. How can I recode the date of the session to a session id (1-9). This would be necessary to obtain information and do some

...= TRUE, sep = ",", quote = "", fill = TRUE); data.2 <- read.csv("http://pegasus.cc.ucf.edu/~xsu/CLASS/STA6704/pat3.csv", header = TRUE, sep = ",", quote = "", fill = TRUE); data.3 <- read.csv("http://pegasus.cc.ucf.edu/~xsu/CLASS/STA6704/pat4.csv", header = TRUE, sep = ",", quote = "", fill = TRUE); baby.1 <- data.frame(cuff=data.1$avg_value, time=seq(1,dim(data.1)[1]), patient=rep(1, dim(data.1)[1])) baby.2 <- data.frame(cuff=data.2$avg_value, time=seq(1,dim(data.2)[1]), patient=rep(3, dim(data.2)[1])) b...

How can I delete both rows and columns that do not meet a particular cut off value. Example: > d <- rbind(c(0, 1, 6, 4), + c(2, 5, 7, 5), + c(3, 6, 1, 6), + c(4, 4, 4, 4)) > f <- as.matrix(d) > f [,1] [,2] [,3] [,4] [1,] 0 1 6 4 [2,] 2 5 7 5 [3,] 3 6 1 6 [4,] 4 4 4 4 I would like to delete all

Hi, I'm try to collect a list of methods/packages available in R for doing in-string variable/symbol substitution, e.g. someFcn("pi=${pi}"), anotherFcn("pi=@pi@") and so on becomes "pi=3.141593". I am aware of the following: ** gsubfn() in the 'gsubfn' package, e.g. > gsubfn( , , "pi = $pi, 2pi = `2*pi`") [1] "pi = 3.14159265358979,