intsvy (version 2.9)

intsvy.per.pv: Calculates percentiles

Description

Calculates percentiles for plausible values

Usage

intsvy.per.pv(pvnames, by, per, data, export=FALSE, name= "output", 
  folder=getwd(), config)

Value

intsvy.per.pv returns a data frame with percentiles and associated standard errors. Default weights (e.g. "TOTWGT" in TIMSS) and percentiles are specified in the config parameter.

Arguments

pvnames

The names of columns corresponding to the achievement plausible scores.

per

User-defined percentiles (e.g., per = c(5, 10, 25, 75, 90, 95)).

by

The label of the categorical grouping variable (e.g., by="IDCNTRYL") or variables (e.g., by=c("IDCNTRYL", "ITSEX")).

data

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

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.

See Also

pisa.per.pv, pirls.per.pv, timss.per.pv

Examples

  if (FALSE) {
    timss.per.pv(pvlabel= paste0("BSMMAT0", 1:5), 
    per = c(5, 10, 25, 50, 75, 90, 95), by="IDCNTRYL", data=timss8)
    
    intsvy.per.pv(pvnames= paste0("BSMMAT0", 1:5),  by="IDCNTRYL", 
    data=timss8, config=timss8_conf)
    
    pirls.per.pv(pvlabel= paste0("ASRREA0", 1:5), by="IDCNTRYL", data=pirls)
    
    intsvy.per.pv(pvnames= paste0("ASRREA0", 1:5), 
    per = c(5, 10, 25, 50, 75, 90, 95), by="IDCNTRYL", data=pirls, 
    config=pirls_conf)
    
    pisa.per.pv(pvlabel= paste0("PV",1:10,"MATH"), 
    per=c(10, 25, 75, 90), by="CNT", data=pisa)
    
    intsvy.per.pv(pvnames= paste0("PV",1:10,"MATH"), 
    by="CNT", data=pisa, config=pisa_conf)
  }