intsvy.rho {intsvy}

Correlation matrix

Description

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

Usage

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

Arguments

variables

Data labels for the variables in the correlation matrix (e.g., variables=c("ASRREA01", "ASDAGE") )

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 PIRLS.

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.

config

Object with configuration of a given study. Should contain the slot 'prefixes' with prefixes of filenames with the student, home, school, and teacher data.

Value

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

See Also

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

Examples

## Not run: 
pirls.rho(variables=c("ASRREA01", "ASDAGE"), by="IDCNTRYL", data=pirls)

## End(Not run)