createKnotsBoundaries | R Documentation |
The function createKnotsBoundaries creates Knots, Boundaries and Loss/Hoss scores for subsequent use and embedding in SGPstateData. Function can be called separately but is usually called as part of
prepareSGP
. See examples below.
createKnotsBoundaries(tmp.data,
knot.cut.percentiles=c(0.2,0.4,0.6,0.8))
tmp.data |
Data supplied to function in LONG format. See sgpData_LONG for an exemplar. tmp.data must contain, at least, variables 'VALID_CASE', 'CONTENT_AREA', 'SCALE_SCORE', 'GRADE'. |
knot.cut.percentiles |
A numeric vector of quantiles of 'SCALE_SCORE' to be used as the cut points. Default is to use the 20th, 40th, 60th, and 80th percentiles (i.e., c(0.2,0.4,0.6,0.8)). |
Returns a list containing Knots, Boundaries and Loss/Hoss scores.
Damian W. Betebenner dbetebenner@nciea.org
## Not run:
### Run on supplied long data
DEMO_Knots_Boundaries <- createKnotsBoundaries(sgpData_LONG)
### Run as part of prepareSGP
### First NULL out knots and boundaries embedded in SGPstateData
SGPstateData[["DEMO"]][["Achievement"]][["Knots_Boundaries"]] <- NULL
Demonstration_SGP <- prepareSGP(sgpData_LONG)
## End(Not run)
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