ELCIC.gee               The whole procedure for joint selection of mean
                        structure and correlation structure in
                        longitudinal data without missingness or
                        missing completely at random
ELCIC.gee.single        Calculate ELCIC value for a given candidate
                        model under GEE framework with complete
                        longitudinal data or data missing completely at
                        random.
ELCIC.glm               The whole variable selection procedure for mean
                        structure in GLM
ELCIC.glm.single        Variable selection in generalized linear models
                        (GLM)
ELCIC.wgee              The whole procedure for joint selection of mean
                        structure and correlation structure for missing
                        longitudinal data under the mechanism of
                        missing at random and drop-out
ELCIC.wgee.single       Calculate ELCIC value for a given candidate
                        model under WGEE framework for missing
                        longitudinal data under the mechanism of
                        missing at random and drop-out
ELCICgee                Model selection based on ELCIC under the syntax
                        of GEE (Main function).
ELCICglm                Variable selection based on ELCIC under the
                        syntax of GLM (Main function).
ELCICwgee               Model selection based on ELCIC under the syntax
                        of WGEE (Main function).
MLIC.wgee               The whole MLIC procedure for joint selection of
                        mean structure and correlation structure for
                        missing longitudinal data under the mechanism
                        of missing at random and drop-out
MLICwgee                Model selection based on MLIC under the syntax
                        of WGEE (Main function).
QICW.wgee               The whole QICW procedure for joint selection of
                        mean structure and correlation structure for
                        missing longitudinal data under the mechanism
                        of missing at random and drop-out
QICWwgee                Model selection based on QICW under the syntax
                        of WGEE (Main function).
QICc.gee                Joint selection procedure of marginal mean and
                        correlation structures in longitudinal data
                        based on QIC
cond.prob               Calculate conditional probabilities for
                        observing records at each time point
ee.gee                  Estimating equation for GEE without missingness
                        or with data missing completely at random.
ee.gee.mean             Estimating equation of marginal mean for GEE
                        without missingness or missing completely at
                        random
ee.glm                  Estimating equation for ELCIC under GLM
ee.wgee                 Estimating equation for weighted GEE (WGEE) for
                        missing longitudinal data under the mechanism
                        of missing at random and drop-out
ee.wgee.mean            Estimating equation for marginal mean under
                        WGEE for missing longitudinal data under the
                        mechanism of missing at random and drop-out
gee.generator           Generate longitudinal data without missingness
geesimdata              Data simulated for model selection under GEE
                        framework without missingness
glm.generator           Cross-sectional data generation under GLM
glmsimdata              Data simulated for variable selection under GLM
                        framework
impsdata                Inpatient Multidimensional Psychiatric Scale
                        (IMPS)
lambda.find.gee         Calculate the tuning parameters involved in
                        ELCIC under GEE
lambda.find.gee.mean    Calculate the tuning parameters under marginal
                        mean selection in GEE
lambda.find.glm         To calculate tuning parameter involved in ELCIC
                        under GLM
lambda.find.wgee        Calculate the tuning parameters involved in
                        ELCIC under WGEE with data missing at random
lambda.find.wgee.mean   Calculate the tuning parameters involved in
                        marginal mean selection under WGEE with data
                        missing at random
marg.prob               Calculate the inverse of marginal probability
                        for observing records at each time point
respiratorydata         Data from a clinical trial comparing two
                        treatments for a respiratory illness
wgeesimdata             Data simulated for model selection under WGEE
                        framework for missing longitudinal data under
                        the mechanism of missing at random and
                        drop-out.
