search for: y23

Hi all, I have a data.frame with the following colnames pattern: x1 y11 x2 y21 y22 y23 x3 y31 y32 ... I.e. I have an x followed by a few y's. What I would like to do is turn this wide format into a tall format with two columns: "x", "y". The structure is that xi needs to be associated with yij (e.g. x1 should next to y11 and y12, x2 should be next to y21,...

...(group index), Y11 (measurement), error of Y11 (error in measurement) X2, Y21, error of Y21 ... Xn, Yn1, error of Yn1 // End of the first set of measurements X1, Y12, error of Y12, X2, Y22, error of Y22, ... Xn, Yn2, error of Yn2 // End of the second set of measurements X1, Y13, error of Y13, X2, Y23, error of Y23, ... Xn, Yn3, error of Yn3 // end of the third set of measurements I need to put one errbar plot that include all three cases with different symbols for each data set. How can I do this? Thanks in advance. Youngjin [[alternative HTML version deleted]]

Hello! let: test<-1:3 list(test) names(test)<-c("X11","X12","Y23") >test[["Y2"]] 3 I had assumed that the names in a list are like a keys in a hash. Therefore i thought that no value should be returned. The behavior of: >test["Y2"] <NA> NA is as i expected. Should it be as it is? How is the definition of [[]] and []...

After searching in R- Introduction, FAQ, help... I don't understand this: I write a function in a file (.R): tt <- function(mc) { date() mc<-read.csv2("machines.txt",na.strings="") date() } I source it in R and I type tt(). The answer is > tt() [1] "Mon Aug 14 11:18:25 2000" > The instructions following the first "date()" are ignored. Why?

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