pisa.rho {intsvy}

Correlation matrix

Description

pisa.rho produces a correlation matrix for observed variables (NOT for plausible values)

Usage

pisa.rho(variables, by, data, export=FALSE, name= "output", folder=getwd())

Arguments

variables

Data labels for the variables in the correlation matrix (e.g., variables=c("TCHBEHTD", "TCHBEHSO"))

by

The label for the grouping variable, usually the countries (i.e., by="IDCNTRYL"), but could be any other categorical variable.

data

An R object, normally a data frame, containing the data from PISA.

export

A logical value. If TRUE, the output is exported to a file in comma-separated value format (.csv) that can be opened from LibreOffice or Excel.

name

The name of the exported file.

folder

The folder where the exported file is located.

Value

pisa.rho returns a matrix including correlation and standard error values.

See Also

timss.rho, pirls.rho, pirls.rho.pv, timss.rho.pv

Examples

## Not run: 
pisa.rho(variables=c("COGACT", "TCHBEHTD", "TCHBEHSO", "CLSMAN" ), by="IDCNTRYL", data=pisa)

## End(Not run)