Makes a contrast matrix for Type I SS using the forward Doolittle method.

This is a core implementation of 'SAS' procedures for linear models - GLM, REG, ANOVA, TTEST, FREQ, and UNIVARIATE. Some R packages provide Type II and Type III SS. However, the results of nested and complex designs are often different from those of 'SAS'. Different results do not necessarily mean incorrectness. However, many want the same results as 'SAS'. This package aims to achieve that.
Reference: Littell RC, Stroup WW, Freund RJ (2002, ISBN:0-471-22174-0).

Kyun-Seop Bae

sasLM

'SAS' Linear Model

e1 function

<dl> <dt>XpX</dt>
<dd>the crossproduct of a design or model matrix. This should have appropriate column names.</dd> <dt>eps</dt>
<dd>A value less than this is considered zero.</dd></dl>

Arguments

Author

Get a Contrast Matrix for Type I SS — e1

<dl>

 <dt>XpX</dt>
<dd>the crossproduct of a design or model matrix. This should have appropriate column names.</dd>

 <dt>eps</dt>
<dd>A value less than this is considered zero.</dd>

</dl>

e1: Get a Contrast Matrix for Type I SS

Description

Usage

Value

Arguments

Author

Details

Examples