User:Bequw/Stata to R

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Todo: Look for the chapter and section references. Similar sites: http://hyperpolyglot.org/numerical-analysis http://rosettacode.org/wiki/Category:R

Getting Started[edit]

  • help
  • search

Data manipulation and management[edit]

Basic data commands[edit]

  • codebook
  • data management
  • data types
  • datetime
  • describe
    #TODO mention str()
  • edit
  • format
  • inspect
  • label
  • list
  • missing values
  • rename
    >names(df)[match("oldname",names(df))] = "newname" #note this won't give an error if there is no variable named "oldname"
  • save
  • sort #This is not required in R before merging, aggregating, repeated group analysis
    >df = df[order(df$PrimarySortCol, df$SecondarySortCol),]
  • use
  • varmanage

Creating and dropping variables[edit]

  • clear
    see remove() #TODO note how to clear _all
  • compress
  • drop
    >df = df[, !names(df) %in% c("var1todrop", "var2todrop")]
  • egen/generate
    If the dataset already has observations can do stuff like
    >df$sum = df$x1 + df$x2
    >df$id = NA
    If you have an empty dataframe (greated by something like data.frame()) then you can do stuff like
    >df$sum = numeric()
  • functions

Functions and expressions[edit]

  • egen
  • functions

Dates and times[edit]

  • bcal
  • datetime
  • datetime business calendars
  • datetime business calendars creation
  • datetime display formats
  • datetime translation

Loading, saving, importing, and exporting data[edit]

  • edit
  • export
  • haver
  • import
  • import excel
  • import sasxport
  • infile (fixed format)
  • infile (free format)
  • infix (fixed format)
  • input
  • insheet
  • odbc
  • outfile
  • outsheet
  • save
  • sysuse
  • use
  • webuse
  • xmlsave

Combining data[edit]

  • append
  • mi append
  • cross
  • joinby
  • merge
  • mi merge

Reshaping datasets[edit]

  • collapse
    >aggregate
  • contract
  • expand
  • expandcl
  • fillin
  • obs
  • reshape
  • mi reshape
  • rolling
  • separate
  • ssd
  • stack
  • statsby
  • xpose

Labeling, display formats, and notes[edit]

  • format
  • label
  • label language
  • labelbook
  • notes
  • varmanage

Changing and renaming variables[edit]

  • clonevar
  • destring
  • encode
  • generate
  • mvencode
  • order
  • recode
  • rename
  • rename group
  • split
  • varmanage

Examining data[edit]

  • cf
  • codebook
  • compare
  • count
  • describe
  • ds
  • duplicates
  • edit
  • gsort
  • inspect
  • isid
  • lookfor
  • misstable
  • mi describe
  • mi misstable
  • pctile
  • stdescribe
  • summarize
  • svy: tabulate oneway
  • svy: tabulate twoway
  • tabdisp
  • table
  • tabstat
  • tabulate oneway; tabulate twoway
    >table()
  • tabulate, summarize()
  • xtdescribe

File manipulation[edit]

  • cd
    >getwd()
    >setwd("Path") #Window's default windows folder separator character '/' will have be replaced with '\' or fully escaped '//' to work right. If you working interactively, you can enter >scan('', '', n=1) and then at the prompt past directly a windows folder path (with '/'s in it) and it will auto-escape it for you.
  • cf
  • changeeol
  • checksum
  • copy
  • dir
  • erase
  • filefilter
  • mkdir
  • rmdir
  • type
  • zipfile

Miscellaneous data commands[edit]

  • corr2data
  • drawnorm
  • dydx
  • icd9
  • ipolate
  • range
  • sample

Multiple imputation[edit]

  • mi add
  • mi append
  • mi convert
  • mi copy
  • mi describe
  • mi erase
  • mi expand
  • mi export
  • mi export ice
  • mi export nhanes1
  • mi extract
  • mi import
  • mi import flong
  • mi import flongsep
  • mi import ice
  • mi import nhanes1
  • mi import wide
  • mi merge
  • mi misstable
  • mi passive
  • mi ptrace
  • mi rename
  • mi replace0
  • mi reset
  • mi reshape
  • mi set
  • mi stsplit
  • mi update
  • mi varying
  • mi xeq
  • mi XXXset
  • noupdate option
  • styles
  • workflow