controlINPROCreg {npROCRegression}

Function used to set several parameters controlling fitting process.

Description

Function used to set several parameters controlling fitting process.

Usage

controlINPROCreg(step.p = 0.02, kbin = 30, p = 1, h = c(-1, -1, -1, -1), 
seed = NULL, nboot = 500, level = 0.95, resample.m = c("coutcome", "ncoutcome"))

Arguments

step.p

a numeric value, defaulting to 0.02. ROC curves are calculated at a regular sequence of false positive fractions with step.p increment.

kbin

an integer value specifying the number of binning knots. By default 30.

p

an integer value specifying the order of the local polynomial kernel estimator for the regression functions. By default 1.

h

a vector of length 4 specifying the bandwidths to be used for the estimation of the regression and variance functions in healthy population and the regression and variance functions in diseased populations (in this order). By default -1 (selected using cross-validation). A value of 0 would indicate a linear fit.

seed

an integer value specifying the seed for the bootstrap resamples. If NULL it is initialized randomly.

nboot

an integer value specifying the number of bootstrap resamples for the construction of the confidence intervals. By default 500.

level

a real value specifying the confidence level for the confidence intervals. By default 0.95.

resample.m

a character string specifying if bootstrap resampling (for the confidence intervals) should be done with or without regard to the disease status (“coutcome” or “noutcome”). When the resampling method is done conditionally on the disease status, the resampling is based on the residuals of the regression models in healthy and diseased populations. However, when the bootstrap resampling is done without regard to the disease status, a naive bootstrap is used. By default, the resampling is done conditionally on the disease status.

Author(s)

Maria Xose Rodriguez - Alvarez and Javier Roca-Pardinas

See Also

See Also INPROCreg

Examples

data(endosim)
# Evaluate the effect of age on the accuracy of the body mass index for males
m0.men <- INPROCreg(marker = "bmi", covariate = "age", group = "idf_status", 
						tag.healthy = 0, 
						data = subset(endosim, gender == "Men"), 
						ci.fit = FALSE, test = FALSE, 
						accuracy = c("EQ","TH"),
						accuracy.cal="AROC", 
						control=controlINPROCreg(p=1,kbin=30,step.p=0.01), 
						newdata = data.frame(age = seq(18,85,l=50)))	

summary(m0.men)
plot(m0.men)