# r 1653

- How to make a great R reproducible example? aka MCVE (Minimal, Complete, and Verifiable Example)
- How to sort a dataframe by column(s)?
- Grouping functions (tapply, by, aggregate) and the *apply family
- How to join (merge) data frames (inner, outer, left, right)?
- Drop data frame columns by name
- How can we make xkcd style graphs?
- Remove rows with NAs (missing values) in data.frame
- data.table vs dplyr: can one do something well the other can't or does poorly?
- Assignment operators in R: '=' and '<-'
- How do I replace NA values with zeros in an R dataframe?
- What statistics should a programmer (or computer scientist) know?
- Tricks to manage the available memory in an R session
- Plot two graphs in same plot in R
- Quickly reading very large tables as dataframes in R
- Rotating and spacing axis labels in ggplot2
- How to convert a factor to an integer\numeric without a loss of information?
- Drop factor levels in a subsetted data frame
- What is the difference between require() and library()?
- How can I view the source code for a function?
- The difference between [] and [[]] notations for accessing the elements of a list or dataframe
- R function for testing if a vector contains a given element
- How to unload a package without restarting R?
- R list to data frame
- Cluster analysis in R: determine the optimal number of clusters
- Why is `[` better than `subset`?
- How should I deal with “package 'xxx' is not available (for R version x.y.z)” warning?
- Create an empty data.frame
- Run R script from command line
- How to properly document S4 class slots using Roxygen2?
- How do I install an R package from source?
- How to trim leading and trailing whitespace in R?
- How to Correctly Use Lists in R?
- Counting the number of elements with the values of x in a vector
- Is there a built-in function for finding the mode?
- How can 2 strings be concatenated?
- How to find the length of a string in R?
- Tools for making latex tables in R
- How can I read command line parameters from an R script?
- Expert R users, what's in your .Rprofile?
- Convert data.frame columns from factors to characters
- Check existence of directory and create if doesn't exist
- Changing column names of a data frame
- How to set limits for axes in ggplot2 R plots?
- How to find out which package version is loaded in R?
- Extracting specific columns from a data frame
- Write lines of text to a file in R
- How to save a plot as image on the disk?
- Function to Clear the Console in R
- Adding leading zeros using R
- Side-by-side plots with ggplot2