On 21/01/2021 3:58 p.m., Bernard McGarvey wrote:
Here is an example piece of code to illustrate an issue:rm(list=ls()) # Clear Workspace # Data1 <- matrix(data=rnorm(9,0,1),nrow=3,ncol=3) Colnames1 <- c("(A)","(B)","(C)") colnames(Data1) <- Colnames1 print(Data1) DataFrame1 <- data.frame(Data1) print(DataFrame1) colnames(DataFrame1) <- Colnames1 print(DataFrame1) The results I get are: (A) (B) (C) [1,] 0.4739417 1.3138868 0.4262165 [2,] -2.1288083 1.0333770 1.1543404 [3,] -0.3401786 -0.7023236 -0.2336880 X.A. X.B. X.C. 1 0.4739417 1.3138868 0.4262165 2 -2.1288083 1.0333770 1.1543404 3 -0.3401786 -0.7023236 -0.2336880 (A) (B) (C) 1 0.4739417 1.3138868 0.4262165 2 -2.1288083 1.0333770 1.1543404 3 -0.3401786 -0.7023236 -0.2336880 so that when I make the matrix with headings the parentheses are replaced by periods but I can add them after creating the data frame and the column headings are correct. Any ideas on why this occurs?
By default, data.frame() uses names that are legal variable names, so you can do things like Data1$X.A. You can stop this change by saying
DataFrame1 <- data.frame(Data1, check.names=FALSE) Duncan Murdoch ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
