R - Don't use apply on dataframes / ddply by rows and columns

df <- data.frame(c(1,2,3),c(4,5,6), c("A","B","C")) names(df) <- c("x","y","z...

R - Forcing local scope on a function

When writing functions in R, I usually build them from code I've already written. And R doesn't have a local scope, meaning the func...

R Common Error Fixes

I've repeatedly had these errors and it always takes ages to find how to fix them. Error in e$fun(obj, substitute(ex), parent.frame(), e...

Errors when Compile PDF on *.rnw in RStudio

Code: \documentclass{article} \usepackage{longtable} \usepackage[a4paper,margin=0.5in,landscape]{geometry} \begin{document} <<results=...

R Data Table to LaTeX via the package knitr

p_vec <- compute.residual.vector() \documentclass{article} \usepackage{longtable} \begin{document} <<results='asis'>>...