search for: siddique

...o the ith variable? eg, sumvar<-c(sum(WM),...,sum(AF)) if i try for(i in 4:13){ sumVar<- sum(popA[,i]) sumVar2<-c(sumVar) } it returns > sumVar2 [1] 287567 > length(sumVar2) [1] 1 which is only the value at the last spot. i cant quite figure this simple loop. Thanks, Amer Siddique

hello, I have a vector of factors > str(rcptdt) Factor w/ 51 levels "1/10/03","1/13/03",..: > length(rcptdt) [1] 87 which i want to convert to class POSIXlt to extract the day, so: a1<-format(rcptdt,"%m/%d/%y") > length(a1) [1] 87 and: a2<-strptime(a1, "%m/%d/%y") str(a2) `POSIXlt', format: chr [1:87] "2002-04-18"

looking for some thoughts on incorporating R functionality to create histograms of data stored in an informix db. im gonna write the app in .Net and will use a managed provider to access the data. what R libs might I have to package in the assemblies? (sorry my Q is general as Ive only just looked at wanting this yet) Thanks. Amer.

Hi. I want to create a table in latex with regression coefficients and their corresponding p-values. My code is below. How do I format the p-values so that values less than 0.0001 are formated as <.0001 rather than just rounded to 0.0000? Thank you. model<-lm(y~x1+x2) output<-summary(model) output<-as.matrix(coefficients(output)) output<-format.df(ouput,cdec=c(2,2,2,4))

I'm using rpart to fit a tree using a large dataset: 7000 observations, 4651 variables. All but one of the variables (age) are binary. When I run the code: fit1 <- rpart(lowergi ~ ., data=dset,method="class") I get the error: Error in dimnames(X) <-list(dn[1L]], unlist(collabs, use.names=FALSE)) : Length of `dimnames' [2] not equal to array extent I have no idea

Should I be able to use axis() on a barplot? i have a data.frame, the first 3 values of which are: > c[1:3,] median mean A1 56.5 58.50000 A61 73.0 73.00000 A62 63.0 63.00000 > str(c) `data.frame': 19 obs. of 2 variables: $ median: num 56.5 73 63 161 51 55 44.5 22 54 49 ... $ mean : num 58.5 73.0 63.0 161.0 47.5 ... if I do barplot(median) and then try

Hello. I am using R version 2.1.1 on Windows 2000. I am using a par(mfrow=c(2,2)) statement to produce 4 plots on one screen. I want a single horizontal legend to appear at the top of the four plots. My code is something like this: par(mfrow=c(2,2)) plot(x,y1) lines(x,y2) lines(x,y3) plot(x,z1) lines(x,z2) lines(x,z3) plot(x,t1) lines(x,t2) lines(x,t3) plot(x,w1) lines(x,w2) lines(x,w3)