Re: [R] Stuck with levels while reassigning dataframe colnames?

Thanks for the advice, df<-read.table(infile, sep="," skip = 1, header=TRUE) is indeed much cleaner from the outset (and was my usual way to it). I was unaware that readLines(infile, n=1) could get me the first line without reading the whole file again. But I do need to get my head around th

[R] Stuck with levels while reassigning dataframe colnames?

Dear users, I am importing a csv file whose first row is a single value that I need to capture in a variable. infile<-file.choose() in<-read.csv( infile, header=FALSE) single.value<-as.character(in[1,1]) # fine Now I need to take rows 3 and on as the data df<-in[3:dim(in)[1],] But row 2

[R] ddply - how to transform df column "in place"

Dear R-users, I am trying to get the plyr syntax right, without much success. Given: d<- data.frame(cbind(x=1,y=seq(20100801,20100830,1))) names(d)<-c("first", "daterep") d2<-d # I can convert the daterep column in place the classic way: d$daterep<-as.Date(strptime(d$daterep, format="%Y%m%d"))

[R] lattice panel.abline use

Dear R-users, I am unsuccessful in trying to add an horizontal line to all graphs in the example below: library(lattice) val<-runif(15) x<-rep(seq(1:5),3) type<-c(rep("a",5), rep("b",5), rep("c",5)) xyplot(val ~ x | type, panel.abline(h=.6)) Any hints are appreciated. Best regards, ---Jean

Re: [R] Plotting a quadratic line on top of an xy scatterplot

Hi, Is it just me or it appears the "temperature" and "probability" should be reversed? Anyhow it should help you to assign your model to a variable (as Joshua did with his own suggestion) yourmodel <-lm(x[,2] ~ x[,1] + I(x[,1]^2)) # again, taking literally the way you formulated it...

Re: [R] Simple but elusive - expand back from counts

Many thanks to all, the first 3 solutions worked nicely but I did not get around to tweaking properly the others. It's really nice to get thing going in a "one liner" or about... Again greatly appreciated. Cheers! -- View this message in context: http://r.789695.n4.nabble.com/Simple-but-elusive-e

[R] Simple but elusive - expand back from counts

Dear R-users, This should be simple but still eludes me: Given the following tmp<-as.data.frame(matrix(c(44, 10, "abc", 1, 44, 10, "def", 1, 44, 12, "abc", 2), 3, 4, byrow=T)) I want to expand the data to the following form: V1 V2 V3 V4 1 44 10 abc 1 2 44 10 def 1 3 44 12 abc 1 4 44 12 a