R Functions List (+ Examples) | All Basic Commands of the R Programming Language

 

There are thousands and thousands of functions in the R programming language available – And every day more commands are added to the Cran homepage.

To bring some light into the dark of the R jungle, I’ll provide you in the following with a (very incomplete) list of some of the most popular and useful R functions.

For many of these functions, I have created tutorials with quick examples. Just click on the function you are interested in, in order to get more information.

Let me know in the comments, in case you are interested in any particular function. I’ll try my best to publish a tutorial for this function as soon as possible.

R Functions List Wordcloud

List of R Commands & Functions

  • abline – Add straight lines to plot.
  • abs – Compute the absolute value of a numeric data object.
  • aggregate – Compute summary statistics of subgroups of a data set.
  • all – Check whether all values of a logical vector are TRUE.
  • all_equal [dplyr] – Compare two data frames.
  • anti_join [dplyr] – Anti join two data frames.
  • any – Check whether any values of a logical vector are TRUE.
  • apply – Apply function by rows or columns of a data frame.
  • apropos – Return character vector with names of objects that contain the input.
  • arrange [dplyr] – Order data frames and tibbles.
  • attach – Give access to variables of a data.frame.
  • attr – Return or set a specific attribute of a data object.
  • attributes – Return or set all attributes of a data object.
  • as.Date – Convert character strings to Date class.
  • as.double – Convert integer to double class.
  • as.factor – Convert a data object to the class factor.
  • as.name – Convert character string to name class object.
  • as.numeric – Convert a data object to the class numeric.
  • as.tbl [dplyr] – Convert data.frame to tibble.
  • axis – Create user-defined axis ticks.
  • barplot – Create a barplot.
  • beep [beepr] – Play sound at the end of an R script.
  • between [dplyr] – Test whether a numeric value falls into a specified range.
  • bind_cols [dplyr] – Bind columns and vectors.
  • bind_rows [dplyr] – Bind rows of data sets.
  • boxplot – Create a boxplot.
  • break – Break for-loop in R.
  • call – Create objects of the class call.
  • case_when [dplyr] – Distinguish between cases based on logical conditions.
  • casefold – Translate character to lower or upper case.
  • cases [memisc] – Distinguish between cases based on logical conditions.
  • cat – Return character string in readable format.
  • cbind – Combine vectors, matrices and/or data frames by column.
  • ceiling – Round numeric up to the next higher integer.
  • charmatch – Return position of first match between two data objects.
  • chartr – Translate characters of string to lower and/or upper case.
  • coalesce [dplyr] – Replace missing values.
  • colMeans – Compute the mean of each column of a numeric data frame, matrix or array.
  • colMedians [robustbase] – Compute the median of each column of a numeric matrix.
  • colnames – Retrieve or set the column names of a data frame or matrix.
  • colSums – Compute the sum of each column of a numeric data frame, matrix or array.
  • combine [dplyr] – Combine values.
  • complete.cases – Return a logical vector that indicates which cases have no missing values.
  • cumall [dplyr] – Apply cumulative version of all Function.
  • cumany [dplyr] – Apply cumulative version of any Function.
  • cume_dist [dplyr] – Rank a vector.
  • cummean [dplyr] – Apply cumulative version of mean Function.
  • cumsum – Calculate the cumulative sum of the elements of a numeric vector.
  • cut – Convert numeric values into factorial ranges.
  • dbeta – Return corresponding value of beta density.
  • dbern – Return corresponding value of bernoulli PDF.
  • dbinom – Return corresponding value of binomial density.
  • dcauchy – Return corresponding value of cauchy density.
  • dchisq – Return corresponding value of chi-square PDF.
  • dense_rank [dplyr] – Rank a vector.
  • density – Draw Kernel Density Plot.
  • deparse – Convert an expression to the character class.
  • detach – Remove the attachment of a data.frame or unload a package.
  • dexp – Return corresponding value of exponential density.
  • df – Return corresponding value of F PDF.
  • dgamma – Return corresponding value of gamma density.
  • dgeom – Return corresponding value of geometric PDF.
  • dhyper – Return corresponding value of hypergeometric PDF.
  • diff – Compute difference between pairs of consecutive elements of a vector.
  • difftime – Calculate the time difference of two date or time objects.
  • dim – Return the dimension (e.g. the number of columns and rows) of a matrix, array or data frame.
  • dir – Return a character vector of file and/or folder names within a directory.
  • dist – Compute distance matrices.
  • distinct [dplyr] – Retain only unique rows of data set.
  • dlnorm – Return corresponding value of log normal PDF.
  • dlogis – Return corresponding value of logistic PDF.
  • dnbinom – Return corresponding value of negative binomial density.
  • dnorm – Create standard normal distribution.
  • do.call – Execute function by its name and a list of corresponding arguments.
  • download.file – Download file from internet.
  • dpois – Return value of poisson density.
  • droplevels – Remove unused levels of a factor.
  • dsignrank – Return corresponding PDF value of wilcoxon signedank statistic.
  • dt – Return corresponding value of Student t PDF.
  • dtukey – Return corresponding value of studentized range PDF.
  • dunif – Return corresponding value of uniform PDF.
  • dweibull – Return corresponding value of weibull density.
  • dwilcox – Return corresponding PDF value of wilcoxon rank sum statistic.
  • ecdf – Compute the Empirical Cumulative Distribution Function (ECDF).
  • eval – Evaluate an expression and return the result.
  • exists – Check whether an object is defined in the R environment.
  • expression – Create an R object of the expression class.
  • filter [dplyr] – Subset rows by logical condition.
  • find – Return location where objects of a given name can be found.
  • first [dplyr] – Extract first value from vector.
  • floor – Round numeric down to the next lower integer.
  • format – Encode data objects into common formats.
  • full_join [dplyr] – Full join two data frames.
  • gather [tidyr] – Reshape data frame from wide to long format in R.
  • geom_bar – Create a barplot.
  • geom_boxplot [ggplot2] – Create a boxplot.
  • geom_histogram [ggplot2] – Draw a histogram.
  • geom_line [ggplot2] – Draw a line graph.
  • geometric.mean [psych] – Compute the geometric mean.
  • get – Search and call a data object.
  • get0 – Call an existing data object or return an alternative value.
  • getwd – Return filepath of the current working directory.
  • ggpairs [GGally] – Return a matrix of plots based on a given data set.
  • gregexpr – Search for match of certain character pattern.
  • grep – Search for match of certain character pattern and return indices.
  • grepl – Search for match of certain character pattern and return logical.
  • gsub – Replace all matches in character string.
  • harmonic.mean [psych] – Compute the harmonic mean.
  • heatmap – Create heatmap in Base R.
  • hist – Create histogram.
  • if_else [dplyr] – Conditionally select an element.
  • ifelse – Select elements conditionally.
  • inner_join [dplyr] – Inner join two data frames.
  • integrate – Integrate a user-defined function.
  • IQR – Compute the Interquartile Range.
  • is.double – Test whether a data object has the double class.
  • is.na – Return a logical vector or matrix indicating which elements are missing.
  • is.name – Test whether a data object has the class name.
  • is.nan – Return a logical vector or matrix indicating which elements are not a number.
  • is.null – Return a logical value indicating whether a data object is of the data class NULL.
  • is.tbl [dplyr] – Check if data object is a tibble.
  • is.unsorted – Check whether an input is unsorted.
  • jitter – Add noise to a numeric vector.
  • julian – Return the number of days between two date objects.
  • lag [dplyr] – Lag a vector.
  • lapply – Apply function to all list elements.
  • last [dplyr] – Extract last value from vector.
  • layout – Specify complex plot arrangements.
  • lead [dplyr] – Lead a vector.
  • left_join [dplyr] – Left join two data frames.
  • length – Return the length of data objects such as vectors or lists.
  • libPath – Get or set directory path of installed packages.
  • list.files – List files with specific extension in working directory.
  • load – Load RData workspace file into R.
  • log – Compute logarithms of numeric values.
  • log2 – Compute logarithms of numeric values with base of 2.
  • log10 – Compute logarithms of numeric values with base of 10.
  • lowess – Compute the lowess smoother.
  • mapply – Apply function to multiple data groups.
  • match – Return position of first match between two data objects.
  • max – Compute the maximum value of a vector or column.
  • mad – Compute the median absolute deviation.
  • mean – Compute the arithmetic mean.
  • median – Compute the median.
  • melt [reshape2] – Reshape data frame from wide to long format in R.
  • merge – Merge data frames.
  • message – Generate diagnostic message.
  • mget – Search and call several data objects.
  • min – Compute the minimum value of a vector or column.
  • min_rank [dplyr] – Rank a vector.
  • Mode [DescTools] – Compute the mode.
  • months – Return the corresponding month of a date.
  • mutate [dplyr] – Add new variable to data set.
  • n.readLines [reader] – Skip ahead in a file and read text lines.
  • na.omit – Remove incomplete cases of a data object.
  • na_if [dplyr] – Replace NA values.
  • names – Return or set the names of a data object.
  • nchar – Return the number of elements (e.g. letters) of a character object.
  • ncol – Return the number of columns of a matrix or data frame.
  • near [dplyr] – Compare numeric vectors.
  • next – Skip certain parts of for-loop in R.
  • nrow – Return the number of rows of a matrix or data frame.
  • nth [dplyr] – Extract certain values from vector.
  • ntile [dplyr] – Rank a vector.
  • optim – Apply general-purpose optimization.
  • optimize – Perform one dimensional optimization.
  • order – Return position of each input element in ascending or descending order.
  • outer – Apply a function to two arrays.
  • packageVersion – Find out the currently loaded version of an R package.
  • pairs – Return a plot matrix consisting of scatterplots for each variable-combination of a data frame.
  • par – Set or Query graphical parameters.
  • parse – Convert a character to the expression class.
  • paste – Concatenate inputs to string.
  • paste0 – Concatenate inputs to string with given separator.
  • pbern – Return corresponding value of bernoulli CDF.
  • pbeta – Return corresponding value of beta cumulative distribution function.
  • pbinom – Return corresponding value of binomial cumulative distribution function.
  • pcauchy – Return corresponding value of cauchy cumulative distribution function.
  • pchisq – Return corresponding value of chi-square CDF.
  • percent [formattable] – Format number as percentage.
  • percent [scales] – Format number as percentage.
  • percent_rank [dplyr] – Rank a vector.
  • pexp – Return corresponding value of exponential cumulative distribution function.
  • pf – Return corresponding value of F CDF.
  • pgamma – Return corresponding value of gamma cumulative distribution function.
  • pgeom – Return corresponding value of geometric CDF.
  • phyper – Return corresponding value of hypergeometric CDF.
  • plnorm – Return corresponding value of log normal CDF.
  • plogis – Return corresponding value of logistic CDF.
  • plot – Draw a scatterplot or density plot.
  • pmatch – Return position of first match between two data objects.
  • pmax – Return the parallel maxima of two or more vectors.
  • pmin – Return the parallel minima of two or more vectors.
  • pnbinom – Return corresponding value of negative binomial cumulative distribution function.
  • pnorm – Return value of distribution function.
  • polygon – Draw a polygon to a plot.
  • ppois – Return value of poisson cumulative distribution function.
  • pretty – Compute a sequence of equally spaced round values.
  • print – Return data object to the R (or RStudio) console.
  • psignrank – Return corresponding CDF value of wilcoxon signedank statistic.
  • pt – Return corresponding value of Student t CDF.
  • ptukey – Return corresponding value of studentized range CDF.
  • pull [dplyr] – Extract columns of data frame or tibble.
  • punif – Return corresponding value of uniform CDF.
  • pweibull – Return corresponding value of weibull CDF.
  • pwilcox – Return corresponding CDF value of wilcoxon rank sum statistic.
  • qbern – Return corresponding value of bernoulli quantile function.
  • qbeta – Return corresponding value of beta quantile function.
  • qbinom – Return corresponding value of binomial quantile function.
  • qcauchy – Return corresponding value of cauchy quantile function.
  • qchisq – Return corresponding value of chi-square quantile function.
  • qexp – Return corresponding value of exponential quantile function.
  • qf – Return corresponding value of F quantile function.
  • qgamma – Return corresponding value of gamma quantile function.
  • qgeom – Return corresponding value of geometric quantile function.
  • qhyper – Return corresponding value of hypergeometric quantile function.
  • qlnorm – Return corresponding value of log normal quantile function.
  • qlogis – Return corresponding value of logistic quantile function.
  • qnbinom – Return corresponding value of negative binomial quantile function.
  • qnorm – Return value of quantile function.
  • qpois – Return value of poisson quantile function.
  • qqnorm – Create a normal QQplot.
  • qsignrank – Return corresponding quantile function value of wilcoxon signedank statistic.
  • qt – Return corresponding value of Student t quantile function.
  • qtukey – Return corresponding value of studentized range quantile function.
  • quantile – Compute sample quantiles.
  • quarters – Return the corresponding quarter of a date.
  • qunif – Return corresponding value of uniform quantile function.
  • qweibull – Return corresponding value of weibull quantile function.
  • qwilcox – Return corresponding quantile function value of wilcoxon rank sum statistic.
  • R.Version – Get current R version.
  • rank – Return ranking position of input.
  • rbern – Return bernoulli distributed random number.
  • rbeta – Draw random number from beta density.
  • rbind – Combine vectors, matrices and/or data frames by row.
  • rbind.fill [plyr] – Row-bind matrices or data frames with different columns.
  • rbinom – Draw random number from binomial density.
  • rcauchy – Draw random number from cauchy density.
  • rchisq – Return chi-square distributed random number.
  • read_excel [readxl Package] – Read Excel File in R.
  • read.xlsx [xlsx Package] – Read Excel File in R.
  • read.xlsx [openxlsx Package] – Read Excel File in R.
  • readline – Interactively read a line from the terminal.
  • readLines – Read text lines from an input file.
  • readRDS – Load RData workspace file into R.
  • recode [dplyr] – Replace certain values of a vector.
  • recode_factor [dplyr] – Replace certain values of a factor vector.
  • regexpr – Search for match of certain character pattern.
  • regexec – Search for match of certain character pattern.
  • remove – Clear specific data object from R workspace.
  • rename [dplyr] – Rename variables of data frame or tibble.
  • rm – Clear specific data object from R workspace.
  • rep – Replicate elements of vectors and lists.
  • replace – Exchanges values in data object.
  • return – Return output of user-defined R function.
  • rev – Return a reversed version of vectors or other data objects.
  • rexp – Draw random number from exponential density.
  • rf – Return F distributed random number.
  • rgamma – Draw random number from gamma density.
  • rgeom – Return geometrically distributed random number.
  • rhyper – Return hypergeometrically distributed random number.
  • right_join [dplyr] – Right join two data frames.
  • rlnorm – Return log normally distributed random number.
  • rlogis – Return logistically distributed random number.
  • rnbinom – Draw random number from negative binomial density.
  • rnorm – Draw normally distributed random number.
  • rollmean [zoo] – Calculate moving average.
  • rollmax [zoo] – Calculate moving maximum.
  • rollmedian [zoo] – Calculate moving median.
  • rollsum [zoo] – Calculate moving sum.
  • round – Round numeric to specified number of decimal places.
  • row_number [dplyr] – Rank a vector.
  • row.names – Get or set row names of data frame or matrix.
  • rowMeans – Compute the mean of each row of a numeric data frame, matrix or array.
  • rowMedians [robustbase] – Compute the median of each row of a numeric matrix.
  • rowSums – Compute the sum of each row of a numeric data frame, matrix or array.
  • rpois – Draw random value of poisson density.
  • rsignrank – Return random number according to wilcoxon signedank statistic.
  • rt – Return Student t distributed random number.
  • rtukey – Return studentized range distributed random number.
  • runif – Return uniformly distributed random number.
  • rweibull – Draw random value of weibull density.
  • rwilcox – Return random number according to wilcoxon rank sum statistic.
  • sample – Take a random sample or permutation of a data object.
  • sample_frac [dplyr] – Take a sample of a certain fraction of a data set.
  • sample_n [dplyr] – Take a sample of N cases of a data set.
  • sapply – Apply function to all list elements and convert output to vector.
  • save – Save R data objects as RData workspace file.
  • save.image – Save global R environment as RData workspace file.
  • saveRDS – Save single R data object as RData workspace file.
  • scale – Standardize data.
  • scan – Read data into vector or list from file or R console.
  • sd – Compute standard deviation.
  • segments – Draw a line segment between two pairs of points.
  • select [dplyr] – Select variables of data frame or tibble.
  • semi_join [dplyr] – Semi join two data frames.
  • seq – Generate sequence of numeric values.
  • set.seed – Set a random seed.
  • setdiff – Identify which elements of a data object X are not existent in a data object Y.
  • setNames [stats] – Set names of a data object and return the object.
  • setnames [data.table] – Change names of a data.frame or data.table by reference.
  • setwd – Specify new working directory.
  • shapiro.test – Perform Shapiro-Wilk normality test.
  • sign – Return the signs of numeric elements.
  • signif – Round numeric to specified number of digits.
  • sink – Export R output to external file.
  • slice [dplyr] – Extract certain rows of data set.
  • solve – Solve system of equations.
  • sort – Return input in ascending or descending order.
  • sort.int – Return input in ascending or descending order.
  • sort.list – Return position of each element of a single input.
  • split – Divide data into groups.
  • sprintf – Return character containing a formatted combination of input values.
  • sqrt – Compute the square root of a numeric data object.
  • stat_qq_line [ggplot2] – Add theoretical line to QQplot.
  • std.error [plotrix] – Compute standard error in R.
  • stop – Generate error message and stop executing the current R code.
  • str_c [stringr] – Combine several inputs into a single character vector.
  • str_count [stringr] – Count number of matches in a character string.
  • str_detect [stringr] – Detect presence or absence of pattern in character string.
  • str_dup [stringr] – Duplicate and concatenate strings within a character vector.
  • str_ends [stringr] – Detect the presence or absence of a pattern at the end of a character string.
  • str_extract [stringr] – Extract matching patterns from character string .
  • str_flatten [stringr] – Flatten a character string.
  • str_length [stringr] – Return the length of a string.
  • str_locate [stringr] – Locate the first position of patterns in a character string.
  • str_locate_all [stringr] – Locate the position of patterns in a character string.
  • str_match [stringr] – Extract first matched groups from a string.
  • str_match_all [stringr] – Extract matched groups from a string.
  • str_order [stringr] – Order a vector of character strings.
  • str_remove [stringr] – Remove first matched patterns in a character string.
  • str_remove_all [stringr] – Remove all matched patterns in a character string.
  • str_replace [stringr] – Replace first matched patterns in character strings.
  • str_replace_all [stringr] – Replace all matched patterns in character strings.
  • str_replace_na [stringr] – Replace NA values in a character string.
  • str_sort [stringr] – Sort a vector of character strings.
  • str_split [stringr] – Split up a string into pieces.
  • str_split_fixed [stringr] – Split up a string into a fixed amount of pieces.
  • str_starts [stringr] – Detect the presence or absence of a pattern at the beginning of a character string.
  • str_sub [stringr] – Extract or replace substring from character string.
  • str_subset [stringr] – Extract character strings matching a pattern.
  • str_trim [stringr] – Trim whitespace from a character string.
  • str_trunc [stringr] – Truncate character strings.
  • str_which [stringr] – Identify positions in a character string matching a pattern.
  • str_wrap [stringr] – Wrap a character string into nicely formatted paragraphs.
  • strftime – Convert time objects to characters.
  • strptime – Convert characters to time objects.
  • strsplit – Split elements of a character string.
  • structure – Set additional attributes of a data object.
  • sub – Replace first match in character string.
  • substr – Extract or replace a substring in a character vector.
  • substring – Extract or replace a substring in a character vector.
  • sum – Compute the sum of a numeric input vector.
  • summary – Compute summary statistics of data and model objects.
  • sweep – Apply an operation (e.g. + or -) to a matrix by row or column.
  • switch – Run a specific code block and return its result.
  • t – Transpose data frame.
  • tapply – Apply function to multiple data groups.
  • text – Draw text elements to plots.
  • tolower – Translate character to lower case.
  • top_frac [dplyr] – Extract certain fraction at the top of data.
  • top_n [dplyr] – Extract first n rows of data.
  • toupper – Translate character to upper case.
  • transform – Modify data frames easily.
  • transmute [dplyr] – Create new variable based on data set.
  • trimws – Trim Leading and Trailing Whitespace.
  • trunc – Cut off decimal places of a numeric input.
  • tryCatch – Check expressions for error and warning messages.
  • type.convert – Convert data object to appropriate class.
  • union – Return values that appear in at least one of two data objects.
  • unique – Remove duplicates from data objects.
  • unit [grid] – Create data object with the class unit.
  • unlist – Convert a list to a single vector.
  • unsplit – Reverse output of split function.
  • vapply – Apply function to all list elements and convert output to vector.
  • var – Compute sample variance.
  • warning – Generate warning message.
  • weekdays – Return the corresponding weekday of a date.
  • weighted.mean – Compute the weighted arithmetic mean.
  • weightedMean [matrixStats] – Compute the weighted arithmetic mean.
  • which – Return indices of certain values based on logical condition.
  • with – Evaluates expression in environment constructed based on data frame.
  • within – Evaluates expression in environment and modify data frame.
  • write – Write data to files.
  • write.xlsx [xlsx] – Export data frame from R to Excel workbook.
  • wt.mean [SDMTools] – Compute the weighted arithmetic mean.
  • xtfrm – Produce numeric vector which sorts in same order as input.
  • xyplot [lattice] – Create scatterplot.

 

Basic R Functions – Video Tutorial for the Most Common Commands

Are you looking for an overview of the most common R functions? Have a look at the following Video of the UTSSC YouTube channel. In the video, the speaker gives an introduction to a list of some basic R commands.

 

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15 Comments. Leave new

  • Kothandaraman Narasimhan
    October 30, 2019 3:37 pm

    Hi Joachim, the compilation is getting better day by day. Small suggestion, in the list of R Commands & Functions can you please add Tidyverse grammar such as “pull” etc.
    Thank you
    Nara

    Reply
  • Oreste Bruno
    May 4, 2020 12:44 pm

    Muchas gracias por todo el material que publican. Un gran trabajo. Felicitaciones

    Reply
  • Hi,
    It would be nice to add the “subset” function to the list.

    Reply
    • Hi Ali,

      Thank you for the suggestion!

      I’m planning to do a series with new R-function tutorials starting this week. I’ll also include a tutorial on the subset function to this series.

      You may follow me on Twitter to get regular updates on the newest R-function tutorials: https://twitter.com/JoachimSchork

      Regards,

      Joachim

      Reply
  • This is great! Thank you. Could you include the switch command and information on how to write functions within functions lines of code (if not done already; I did not check for that)?

    Reply
    • Hey Cessar,

      Thanks a lot for the nice feedback!

      Actually, I have created a tutorial on the switch function just a few days ago and haven’t added it to the list yet. You can find it here: https://statisticsglobe.com/switch-function-in-r/

      Could you elaborate what you mean with “how to write functions within functions lines of code”? I’m not sure if I got what you are looking for. ๐Ÿ™‚

      Regards,

      Joachim

      Reply
  • I am still wondering why anyone would take the effort to try to use an archaic programme like R. A command prompt? We are living in 2020 and not 1980. Why not use Excel? For anyone not used to typing commands and programming it is a disaster which leads to frustration also caused by thousands of add-ons which is the reason why copying commands in tutorials and examples does not work because you just havenโ€™t downloaded the right add-on.

    Reply
  • Great tutorial thank you for sharing

    Reply
  • Hi!

    This side is very nice and helpful! Really good job, specially on the examples.
    Maybe you can link the functions. F.e. when you use the mean function in your aggregate example you can link it – so it gets easy to click through your list. By now this is not a big problem but it might get if you include others from different packages. It also might create a more connected learning.
    But nevertheless really love your page!!

    Greetz
    Simon

    Reply
    • Hey Simon,

      Thanks a lot for the kind words and the feedback!

      In fact, I already try to include links to other functions in case I’m referring to them in a tutorial. It is sometimes difficult to add links to older tutorials when publishing a tutorial about a new function though.

      I have added a link to the mean function within the text of the aggregate tutorial. However, please let me know in case you spot other missing links! ๐Ÿ™‚

      Thanks again!

      Joachim

      Reply

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