ic_sample: Draw samples from an icenReg model

In icenReg: Regression Models for Interval Censored Data

Draw samples from an icenReg model

Description

Samples response values from an icenReg fit conditional on covariates, but not censoring intervals. To draw response samples conditional on covariates and restrained to intervals, see imputeCens.

Usage

ic_sample(fit, newdata = NULL, sampleType = "fullSample", samples = 5)

Arguments

fit	icenReg model fit
newdata	data.frame containing covariates. If blank, will use data from model
sampleType	type of samples See details for options
samples	Number of samples

Details

Returns a matrix of samples. Each row of the matrix corresponds with a subject with the covariates of the corresponding row of newdata. For each column of the matrix, the same sampled parameters are used to sample response variables.

If newdata is left blank, will provide estimates for original data set.

There are several options for how to sample. To get random samples without accounting for error in the estimated parameters imputeType ='fixedParSample' takes a random sample of the response variable, conditional on the response interval, covariates and estimated parameters at the MLE. Alternatively, imputeType = 'fullSample' first takes a random sample of the coefficients, (assuming asymptotic normality for the ic_par) and then takes a random sample of the response variable, conditional on the response interval, covariates, and the random sample of the coefficients.

Author(s)

Clifford Anderson-Bergman

Examples

simdata <- simIC_weib(n = 500)

fit <- ic_par(cbind(l, u) ~ x1 + x2,
              data = simdata)

newdata = data.frame(x1 = c(0, 1), x2 = c(1,1))

sampleResponses <- ic_sample(fit, newdata = newdata, samples = 100)

icenReg documentation built on May 29, 2024, 5:32 a.m.