cStep2

Derives the set of observation numbers for step 2 for forsearch in Cox proportional 
 hazard models

 manip 

Identifies potential data outliers and their impact on estimates and
analyses. Tool for evaluation of study credibility. Uses the forward
search approach of Atkinson and Riani, "Robust Diagnostic Regression
Analysis", 2000,<ISBN: o-387-95017-6> to prepare descriptive statistics
of a dataset that is to be analyzed by functions lm {stats}, glm {stats},
nls {stats}, lme {nlme}, or coxph {survival}, or their equivalent in
another language. Includes graphics functions to display the
descriptive statistics.

William Fairweather

forsearch

Diagnostic Analysis Using Forward Search Procedure for Various
Models

cStep2 function

<dl> <dt>fe</dt>
<dd>Right hand side of formula</dd> <dt>finalm</dt>
<dd>List of rows in model at each stage</dd> <dt>rimbs</dt>
<dd>List, each element is a complete matrix of obs numbers and 
 corresponding subset codes</dd> <dt>dfa2</dt>
<dd>Complete data frame with factor subset indicator codes</dd> <dt>onlyfactor</dt>
<dd>Logical. TRUE if there are no continuous independent variables</dd> <dt>ycol</dt>
<dd>Response column number</dd> <dt>cphties</dt>
<dd>Character designation of method of handling ties</dd> <dt>mstart</dt>
<dd>Number of observations in first stage of Step 2</dd> <dt>rnk</dt>
<dd>Rank of linear analysis with factor variables removed</dd> <dt>b.d</dt>
<dd>Indicator of starting point for diagnostic listings</dd></dl>

Arguments

Author

Update Observation Set in Step 2 — cStep2

<dl>

 <dt>fe</dt>
<dd>Right hand side of formula</dd>

 <dt>finalm</dt>
<dd>List of rows in model at each stage</dd>

 <dt>rimbs</dt>
<dd>List, each element is a complete matrix of obs numbers and 
 corresponding subset codes</dd>

 <dt>dfa2</dt>
<dd>Complete data frame with factor subset indicator codes</dd>

 <dt>onlyfactor</dt>
<dd>Logical. TRUE if there are no continuous independent variables</dd>

 <dt>ycol</dt>
<dd>Response column number</dd>

 <dt>cphties</dt>
<dd>Character designation of method of handling ties</dd>

 <dt>mstart</dt>
<dd>Number of observations in first stage of Step 2</dd>

 <dt>rnk</dt>
<dd>Rank of linear analysis with factor variables removed</dd>

 <dt>b.d</dt>
<dd>Indicator of starting point for diagnostic listings</dd>

</dl>

cStep2: Update Observation Set in Step 2

Description

Usage

Value

Arguments

Author

Details