Impute Censored Values

Impute value for multiply censored data.

impute(x, imputeOption = "mid")

Arguments

x

vector of type survival::Surv

imputeOption

imputation method [default= "mid"], valid impute options are "lower", "upper", "mid", "norm", "lnorm"

Value

vector where x is transformed into a simple numeric variable

Details

The imputeOption values of "lower", "upper" and "mid" impute the lower limit, upper limit, and midpoint between the lower and upper limit. In the context of typical water quality data, these options would be equivalent to zero, detection limit and 1/2 detection limit substitution. Options for substituting the normal ["norm"] or lognormal ["lnorm"] expectation can also be used.

See also

makeSurvDF, unSurvDF , unSurv, imputeDF, imputeDF,

Examples

if (FALSE) {
x  <- dataCensored[1:20,"tdp"]
x.lower <- impute(x,'lower')
x.mid   <- impute(x,'mid')
x.upper <- impute(x,'upper')
x.norm  <- impute(x,'norm')
x.lnorm <- impute(x,'lnorm')
}