R Tips

R! Tips

• R Tips: A lot of R tips - Paul E. Johnson  the latest html version is here and the PDF version is here.
• R Tips and Links - Howard Seltman.
• Set user and default R library folder when R starting?
• in RStudio, which is my favorite open source integrated development environment (IDE) for R
• in the R console, type ".libPaths()" to find the default library folder(s).
• go to "\RStudio\R".
• edit file "Options.R".
• add ".libPaths(c("../RStudio/R/library","x:/MyRLib"))".
• save the change.
• Find argument in a function using "args()" for example: args(ls). The three-dots construct in R
• Set user's R library folders as the first library after R started?
• in the R console, type ".libPaths(c("xxx/MyRLibrary1"," xxx/MyRLibrary2"))"
• or, in the RStudio, go to the "\R\" under the RStudio, edit file "Options.R", add one line ".libPaths(c("c:/myRlibsxxxx", .libPaths())", and save it.
• Customize startup of R! (Where to setup R startup environment)
• you can change options through RStudio File -> Tools - > Options
• or,
• open or create file named 'Rprofile.site' under the "..\etc\"
• add options line you want:
• options(digits = 5)           # to set decimal place
• option(width = 100)
• ".First" function will run at the start of the R: 
• .First<-function() {library(a); library(b)}
• ".Last" function will run at the end of the session ( I don't use this usually): 
• .Last <-function(){
• xxx
• }. 
• Do Basic Calculus Using R!
• RMarkdown: Generate a color-coded/formatted Word file of R! using RStudio
• 10 Tips for making your R graphics look their best
• Quantile Regression for Complex Survey Data
• Piecewise/Segmented Regression Related
• How to get orthogonal polynomial coefficient/vector/codes