This page provides tables which make it easy to find functions for usual tasks in statistics in R, SAS and Stata. Other software may also be included in the future such as SPSS.
Contents
Data management Edit
Function
R
Stata
SAS
Merge
merge()
merge / mmerge

Reshape
reshape()
reshape

Expand a dataset
expand() (epicalc )
expand

Descriptive Statistics Edit
Function
R
Stata
SAS
Mean
mean()
mean
proc means
Histogram
hist()
hist

Frequency table
table()
ta
proc freq
Regression models Edit
Function
R
Stata
SAS
Least Square
lm()
reg
proc reg
GLM
glm()
glm
proc glm
Probit models
glm(, family = binomial(link="probit"))
probit

Logit models
glm(, family = binomial(link="logit"))
logit

Linear fixed effects model
plm( , model = "within") (plm )
xtreg , fe

Linear random effects model
plm( , model = "random") (plm )
xtreg , re

Linear quantile regression
rq() (quantreg )
qreg

Ordinal logistic regression
polr() (MASS )
ologit

Linear IV (2sls)
ivreg() (AER )
ivreg
proc syslin (2sls) 
Programming Edit
Function
R
Stata
SAS
Check some condition
stopifnot()
assert
