| xtab {prettyR} | R Documentation |
Crosstabulates variables with small numbers of unique values.
xtab(formula,data,varnames=NULL,chisq=FALSE,phi=FALSE)
formula |
a formula containing the variables to be crosstabulated |
data |
the data frame from which to select the variables |
varnames |
optional labels for the variables (defaults to names(data)) |
chisq |
logical - whether to display chi squared test(s) of the table(s) |
phi |
whether to calculate and display the phi coefficient of association - only for 2x2 tables |
xtab will accept a formula referring to columns in a data frame or two explicit
variable names.
It calls calculate.xtab for the calculations and displays one or more tables of
results by calling print.xtab.
The result of calculate.xtab if there is only one table to display,
otherwise nil.
Jim Lemon
table, calculate.xtab, print.xtab
test.df<-data.frame(sex=sample(c("MALE","FEMALE"),1000,TRUE),
suburb=sample(1:4,1000,TRUE),social.type=sample(LETTERS[1:4],1000,TRUE))
xtab(sex~suburb+social.type,test.df,chisq=TRUE)