Difference between revisions of "List of R functions"
From Testiwiki
(new page for finding R functions) |
m |
||
| Line 10: | Line 10: | ||
! functionality | ! functionality | ||
|----- | |----- | ||
| − | | c | + | | c() |
| "combine" elements to a vector | | "combine" elements to a vector | ||
|----- | |----- | ||
| − | | array | + | | array() |
| creates arrays | | creates arrays | ||
|----- | |----- | ||
| − | | data.frame | + | | data.frame() |
| creates data.frames | | creates data.frames | ||
|----- | |----- | ||
| − | | list | + | | list() |
| creates lists | | creates lists | ||
|----- | |----- | ||
| − | | mean | + | | mean() |
| mean of the elements of the input vector | | mean of the elements of the input vector | ||
|----- | |----- | ||
| − | | sd | + | | sd() |
| standard deviation of the elements of the input vector | | standard deviation of the elements of the input vector | ||
|----- | |----- | ||
| − | | cor | + | | cor() |
| correlation | | correlation | ||
|----- | |----- | ||
| − | | quantile | + | | quantile() |
| quantiles | | quantiles | ||
|----- | |----- | ||
| − | | read.table | + | | read.table() |
| reads delimited text files | | reads delimited text files | ||
|----- | |----- | ||
| − | | write.table | + | | write.table() |
| writes delimited text files | | writes delimited text files | ||
|----- | |----- | ||
| − | | save | + | | save() |
| save R objects | | save R objects | ||
|----- | |----- | ||
| − | | load | + | | load() |
| load R objects | | load R objects | ||
|----- | |----- | ||
| − | | apply, tapply, lapply | + | | apply(), tapply(), lapply() |
| functions for applying functions over set margins, apply is for arrays, tapply for data.frames and lapply for lists | | functions for applying functions over set margins, apply is for arrays, tapply for data.frames and lapply for lists | ||
|----- | |----- | ||
| − | | merge | + | | merge() |
| merges two data.frames, equivalent of SQL joins | | merges two data.frames, equivalent of SQL joins | ||
|----- | |----- | ||
| − | | order | + | | order() |
| sorts data by given factors, output is an indexing vector | | sorts data by given factors, output is an indexing vector | ||
|----- | |----- | ||
| − | | library | + | | library() |
| loads packages | | loads packages | ||
| + | |} | ||
| + | |||
| + | == Workspace and help == | ||
| + | |||
| + | {|{{prettytable}} | ||
| + | |+ '''Some basic R functions''' | ||
| + | ! 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 | ||
|} | |} | ||
Revision as of 11:20, 3 May 2011
This page is a encyclopedia article.
The page identifier is Op_en5140 |
|---|
| Moderator:Nobody (see all) Click here to sign up. |
| This page is a stub. You may improve it into a full page, and then a rating bar will appear here. |
| Upload data
|
This page contains listings of some R functions and commands by category.
Basics
| function name | functionality |
|---|---|
| c() | "combine" elements to a vector |
| array() | creates arrays |
| data.frame() | creates data.frames |
| list() | creates lists |
| mean() | mean of the elements of the input vector |
| sd() | standard deviation of the elements of the input vector |
| cor() | correlation |
| quantile() | quantiles |
| read.table() | reads delimited text files |
| write.table() | writes delimited text files |
| save() | save R objects |
| load() | load R objects |
| apply(), tapply(), lapply() | functions for applying functions over set margins, apply is for arrays, tapply for data.frames and lapply for lists |
| merge() | merges two data.frames, equivalent of SQL joins |
| order() | sorts data by given factors, output is an indexing vector |
| library() | loads packages |
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 |
Statistical tests
| function name | functionality |
|---|---|
| t.test | en:Student's t-test |
| aov | en:Analysis of variance |
