SGP (version 1.2-0.0)

combineSGP: Combine student data and SGP results

Description

Utility function/exemplar used to merge student long data with results from student growth percentiles and/or student growth projections calculations. Default values of this function are designed to be used following use of other utility functions: prepareSGP and analyzeSGP. Function is integrated with cutscores embedded in SGPstateData to calculate growth-to-standard targets associated with catch-up/keep-up to proficient status and/or move-up/stay-up to advanced status as well as the scale scores associated with these targets.

Usage

combineSGP(sgp_object,
	state=NULL,
	years=NULL,
	content_areas=NULL,
	sgp.percentiles=TRUE,
        sgp.percentiles.baseline=TRUE,
	sgp.projections=TRUE,
	sgp.projections.baseline=TRUE,
	sgp.projections.lagged=TRUE,
        sgp.projections.lagged.baseline=TRUE,
	sgp.target.scale.scores=FALSE,
	sgp.target.content_areas=NULL,
	max.sgp.target.years.forward=3,
	update.all.years=FALSE,
	sgp.config=NULL,
	parallel.config=NULL)

Arguments

sgp_object

A list containing both @Data (from prepareSGP) and @SGP (from analyzeSGP) slots.

state

Acronym for which state is to be used for the lagged projections and growth to standard analyses. Function will try to guess state name from passed sgp_object is missing.

years

A vector of years indicating years of data to merge with @Data. If missing, merge will use all available years of student growth percentile results.

content_areas

A vector of content areas indicating content areas of student growth percentile data to merge with @Data. If missing, merge will use all available content areas of student growth percentile results.

sgp.percentiles

A Boolean variable indicating whether to combine student growth percentiles.

sgp.percentiles.baseline

A Boolean variable indicating whether to combine baseline student growth percentiles.

sgp.projections

A Boolean variable indicating whether to combine current year student growth projections and calculate catch-up/keep-up and move-up/stay-up values.

sgp.projections.baseline

A Boolean variable indicating whether to combine current year baseline student growth projections and calculate catch-up/keep-up and move-up/stay-up values.

sgp.projections.lagged

A Boolean variable indicating whether to combine lagged student growth projections and calculate catch-up/keep-up and move-up/stay-up values.

sgp.projections.lagged.baseline

A Boolean variable indicating whether to combine lagged baseline student growth projections and calculate catch-up/keep-up move-up/stay-up values.

sgp.target.scale.scores

A Boolean variable indicating whether targets from calculated scale scores should be calculated following target calculation.

sgp.target.content_areas

A Boolean variable indicating whether content area associated with SGP targets should be calculated.

max.sgp.target.years.forward

A integer indicating the number of years forward from the lagged (last year's) score to project forward for growth to standard calculations. Default is 3 years from the present, 4 years from the lagged year, which is the standard in most growth to standar

update.all.years

A Boolean argument defaulting to FALSE indicating whether combineSGP should delete previously merged variables calculated in analyzeSGP and re-merge a

sgp.config

Argument (defaults to NULL) passed utilized only for target scale score calculation. If targets for end of course tests are required, user must specify configurations directly. See code from testSGP numbe

parallel.config

Parallel configuration only used when 'sgp.target.scale.scores' is set to TRUE. Default is NULL consistent with no targets being calculated. To utilize parallel processing in the calculation of SGP scale score targets user must specify a list designatin

Value

• Function returns a list containing the input long data set in the @Data slot as a data.table keyed using VALID_CASE, CONTENT_AREA, YEAR, ID merged with student growth percentiles and/or straight/lagged projection targets and catch-up/keep-up and move-up/stay-up status with, if requested, the scale scores associated with such targets.

See Also

prepareSGP, analyzeSGP

Examples

## combineSGP is Step 3 of 5 of abcSGP
Demonstration_SGP <- sgpData_LONG
Demonstration_SGP <- prepareSGP(Demonstration_SGP)
Demonstration_SGP <- analyzeSGP(Demonstration_SGP)
Demonstration_SGP <- combineSGP(Demonstration_SGP)