List of R functions: Difference between revisions
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This page contains listings of some [[R]] functions and commands by category. | This page contains listings of some [[R]] functions and commands by category. | ||
== Workspace and help == | == Workspace and help == | ||
{|{{prettytable}} | {|{{prettytable}} | ||
|+ ''' | |+ '''Workspace and help''' | ||
! function name | ! function name | ||
! functionality | ! functionality | ||
| Line 99: | Line 43: | ||
| quit R | | quit R | ||
|} | |} | ||
== Objects == | |||
{|{{prettytable}} | |||
|+ '''Objects''' | |||
! function name | |||
! functionality | |||
|----- | |||
| mode(x) | |||
| mode of ''x'' | |||
|----- | |||
| ls(), objects() | |||
| list objects in memory | |||
|----- | |||
| rm(x), rm(list = ls()) | |||
| remove ''x'' or all objects | |||
|----- | |||
| exists(x) | |||
| test if object ''x'' exists in memory | |||
|----- | |||
| as.numeric(x), as.list(x), ... | |||
| coerce mode of object ''x'' | |||
|----- | |||
| is.numeric(x), is.na(x), ... | |||
| test mode of object ''x'' | |||
|----- | |||
| identical(x, y) | |||
| test if objects are identical | |||
|----- | |||
| return(invisible(x)) | |||
| return invisible copy (doesn't print) | |||
|} | |||
== Packages == | |||
{|{{prettytable}} | |||
|+ '''Packages''' | |||
! function name | |||
! functionality | |||
|----- | |||
| install.packages(name) | |||
| download and install package ''name'' | |||
|----- | |||
| download.packages(name, dir) | |||
| download package ''name'' into ''dir'' | |||
|----- | |||
| library(name), require(name) | |||
| load package ''name'' | |||
|----- | |||
| data(name) | |||
| load dataset ''name'' | |||
|----- | |||
| .libPaths(dir) | |||
| add directory ''dir'' to library paths | |||
|----- | |||
| sessionInfo() | |||
| list loaded packages | |||
|} | |||
== Flow and control and function definition == | |||
== Statistical tests == | == Statistical tests == | ||
Revision as of 11:37, 3 May 2011
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This page contains listings of some R functions and commands by category.
Workspace and help
| function name | functionality |
|---|---|
| getwd() | get working directory |
| setwd(dir) | set working directory to dir |
| help(topic), ?topic | get help on topic, usually function name |
| help.search("keyword") | search for help |
| help.start() | HTML help start page |
| demo() | list available demonstrations |
| save(..., file), load(file) | save and load objects |
| savehistory(file), loadhistory(file) | save and load command history |
| source(file) | execute commands from file |
| list.files(dir), dir(dir) | list files in directory dir |
| q() | quit R |
Objects
| function name | functionality |
|---|---|
| mode(x) | mode of x |
| ls(), objects() | list objects in memory |
| rm(x), rm(list = ls()) | remove x or all objects |
| exists(x) | test if object x exists in memory |
| as.numeric(x), as.list(x), ... | coerce mode of object x |
| is.numeric(x), is.na(x), ... | test mode of object x |
| identical(x, y) | test if objects are identical |
| return(invisible(x)) | return invisible copy (doesn't print) |
Packages
| function name | functionality |
|---|---|
| install.packages(name) | download and install package name |
| download.packages(name, dir) | download package name into dir |
| library(name), require(name) | load package name |
| data(name) | load dataset name |
| .libPaths(dir) | add directory dir to library paths |
| sessionInfo() | list loaded packages |
Flow and control and function definition
Statistical tests
| function name | functionality |
|---|---|
| t.test | en:Student's t-test |
| aov | en:Analysis of variance |