Sample or subset records from a matrix or a data.frame

sampleIDs.Rd

Sample or subset records from a matrix or a data.frame

sampleIDs(data, Nsamples)

Arguments

data

a data.frame describing patient or other subject covariate and regressor data. If nrow(data)==Nsamples, then all rows in data are returned (in their original order) in the resulting data.frame; if nrow(data)>Nsamples, sampling without replacement from the rows in data is done; if nrow(data)<Nsamples then sampling with replacement is done.

Nsamples

integer denoting the number of individuals in a population. Note: in the case of FLAG_SAMPLE=2, this value is used to specify the number of populations (see Npop). Default: if(is_IQRnlmeParamSpec(obj)) obj$Nsamples else 1L.

Value

a data.frame. If nrow(data)==Nsamples, then all rows in data are included (in their original order); if nrow(data)>Nsamples, sampling without replacement from the rows in data is done; if nrow(data)<Nsamples then sampling with replacement is done. The returned data.frame has a column ID set to the integers 1:Nsamples. If the original data object did have a column ID, this column is copied as a column ID0 in the returned data.frame.

See also

Random sampling of NLME model parameters

General Parameter Format

Other Parameter sampling: calcIndParamValues(), calcTypicalIndParamValues(), combineGPF(), generate_GPFFromIQRnlmeEst(), generate_GPFFromIQRnlmeProject(), generate_GPFFromProjectInfo(), generate_GPFFromProjectInfoList(), getCorMatrixUncertainty(), getCovMatrixIIV(), getCovMatrixUncertainty(), getNamesAllParameters(), getNamesCovariateParameters(), getNamesCovariates(), getNamesErrorParameters(), getNamesIIVCorrParameters(), getNamesIIVParameters(), getNamesModelParameters(), getParamEstimates(), getParamTransformationTypes(), imputeTYPEcol_GPF(), is_GPF(), is_IQRnlmeParamSpec(), read_GPFFromCSV(), read_GPFFromXLS(), sampleIndParamValues(), sampleParamFromUncertainty(), sampleRandomEffects(), sample_GPF(), select_FromGPF(), specifyParamSampling(), transformParamToNormal(), untransformParamFromNormal()

Author

Venelin Mitov (IntiQuan)

Examples

if (FALSE) { # \dontrun{
#See the examples for sampleIndParamValues:
?sampleIndParamValues
} # }