baytrends (version 1.1.0)

impute: Impute Censored Values

Description

Impute value for multiply censored data.

Usage

impute(x, imputeOption = "mid")

Arguments

x

vector of type baytrends::qw

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 eqivalent to zero, detection limit and 1/2 detection limit substitution. Options for substituting the normal ["norm"] or lognormal ["lnorm"] expectation can also be used.

Examples

# NOT RUN {
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')
# }