Annotating text on individual facet in ggplot2...

Remove an entire column from a data.frame in R...

How do you use "<<-" (scoping assignment) in R?...

How to import multiple .csv files at once?...

Remove rows with all or some NAs (missing values) in data.frame...

Formatting Decimal places in R...

Cleaning up factor levels (collapsing multiple levels/labels)...

Concatenate a vector of strings/character...

Split data.frame based on levels of a factor into new data.frames...

How to load packages in R automatically?...

Read an Excel file directly from a R script...

Convert continuous numeric values to discrete categories defined by intervals...

Understanding color scales in ggplot2...

Sort (order) data frame rows by multiple columns...

Remove duplicated rows...

Aggregate / summarize multiple variables per group (e.g. sum, mean)...

How can I remove all duplicates so that NONE are left in a data frame?...

How can I view the source code for a function?...

Replacing NAs with latest non-NA value...

Create binned values of a numeric column...

Extracting specific columns from a data frame...

ggplot with 2 y axes on each side and different scales...

What is the difference between require() and library()?...

How to sum a variable by group...

What do the %op% operators in mean? For example "%in%"?...

R: what are Slots?...

Paste multiple columns together...

Why are these numbers not equal?...

How to plot all the columns of a data frame in R...

Get filename without extension in R...