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Dear, I am having a lucky day. I am programming in RStudio and when I type "black" (quotation signs included, the word turn into a word with black ground. Couldn't get rid of the background----copying to Word, Excel...

I am running R-3.0.3 on RStudio 1.1.183. I have recently gotten the following error message while saving an .RData file with the save.image command. I have not had this problem until recently. Help appreciated...

Dear I estimate a sample selection model using the Clayton copula and Burr and Gaussian marginal. I need to derive ther Kendall'sw tau from the concordance coefficient by integration. I came across a way to do that in R...

Dear all In the grep command below, is there a way to identify only "age" and not "age2"? In other words, I like to greb "age" and "age2" separately, one at a time. Thanks. x<-c("abc","def","rst","xyz...

Can anyone tell me how to retrieve the response (dependent) variable from a probit regression object (as much as model.matrix(obj) retrieves the data matrix). Below is a self-runnable set of codes. Thank you! library(sampleSelection) data<-read...

I install package using either the command line or Tools -> Install packages... (in RStudio) and get a non-fatal message saying... Installing package into ?C:/Users/xuhaer/Documents/R/win-library/3.5? (as ?lib? is unspecified) I know it...

I have a line containing summation of four components. # This works OK: p<-pbivnorm(bb,dd,tau)+pbivnorm(aa,cc,tau)- -pbivnorm(aa,dd,tau)-pbivnorm(bb,cc,tau) # This produces unpredicted results without warning: p<-pbivnorm(bb,dd,tau...

I need help with what may be a simple option in R (or Rstudio)--to receive an echo of a comment line. Running the following two-line script in plain R, # adding 1+2 I did get the echo: > # adding...

In R, I was able to set the language environment by fixing the line in file "C:\Program Files\R\R-4.0.3\etc\Rconsole", line 70 below, set language to EN: language = EN In RStudio, I am not...

I have a data frame containing variables "yr3",...,"yr28". How do I remove them with a wild card----something similar to "del yr*" in Windows/doc? Thank you. > colnames(mydata) ? [1] "year"?????? "weight"???? "confeduc"?? "confothr" "college" ? [6] ... ?[41] "yr3"??????? "yr4...

Dear All I updated to R-4.0.0. and also installed the latest Rtools 4.0 (to now the new default folder c:\rtools40). While compiling a package (binary) I received the follow marning message saying Rtools is required...

Dear All I updated to R-4.0.0. and also installed the latest Rtools 4.0 (to now the new default folder c:\rtools40). While compiling a package (binary) I received the follow marning message saying Rtools is required...

I read a csv file (with read.csv) containing missing values (as shown below). Is there a convenient way to set these NA into zeros? Better yet, is there an option to assign zeros to these blank cells in reading...

Is it possible to release the file destination after sending it to a pdf file? Below, line 3 send the graph to a pdf file. I like to release the devise so that I can see result produced by line...

My obj does not always come with a logical variable defined. So I do my.foo <- function(obj,df,digits=5){ if (!is.na("obj$spec$Fisher")) Fisher<-obj$spec$Fisher ... } This works when "Fisher" is defined in/passed from...

How do I print a matrix running a procedure? In the code below, I print with the cat command and get a vector (from A and C). A<-matrix(rpois(16,lambda=5),nrow=4,byrow=T) B<-diag(4...

Can someone tell me a proper call to a procedure, in this case, pnorm. In what follows, I had expected a = b, but they are not equal. What are wrong with first call and second call? Thank you! try<-function...

I like to be able to use a command with something similar to a "wild card". Below, lines 4 works to delete all three dataframes, but line 5 does not work. Any elegant way to accomplish this? My list of...

Dear all In the grep command below, is there a way to identify only "age" and not "age2"? Thanks. > x<-c("abc","def","rst","xyz","age","age2") > x [1] "abc" "def" "rst" "xyz" "age" "age2" > grep("age2",x) [1] 6...

Hi, dear R users I am a newbie in R and I wantto use the method of meximum likelihood to fit a Weibull distribution to my survival data. I use "optim" as follows: optim(c(1, 0.25),weibull.like...