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

Pasting two vectors with combinations of all vectors' elements...

Annotating text on individual facet in ggplot2...

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

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

How to find the statistical mode?...

Combine two data frames by rows (rbind) when they have different sets of columns...

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

Formatting Decimal places in R...

How do I replace NA values with zeros in an R dataframe?...

Elegant way to check for missing packages and install them?...

How to make a great R reproducible example...

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?...

Change R default library path using .libPaths in Rprofile.site fails to work...

Reshaping data.frame from wide to long format...

What does %>% function mean in R?...

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

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

Combine a list of data frames into one data frame by row...

How can I remove an element from a list?...

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 to reshape data from long to wide format...

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?...