Jonathan Christensen questions

Jonathan Christensen answers

• Selecting random rows by category from a data frame?
• In R, what is the difference between combining columns using & vs. square brackets [][]?
• possible to create latex multicolumns in xtable?
• Reframing magic on data.frame [duplicate]
• How to separate the two leftmost bins of a histogram in R
• how to compare environment for equality in R
• Error in file(file, "rt") : invalid 'description' argument in complete.cases program
• Plot and report X intercept from linear regression - R
• Count rows of a data frame which do not contain `NA` [duplicate]