Makes a contrast matrix for type I SS using 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 does not necessarily mean incorrectness. However, many wants the same results to 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>crossprodut of a design or model matrix. This should have appropriate column names.</dd> <dt>eps</dt>
<dd>Less than this value is considered as zero.</dd></dl>

Arguments

Author

Get a Contrast Matrix for Type I SS — e1

<dl>

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

 <dt>eps</dt>
<dd>Less than this value is considered as zero.</dd>

</dl>

e1: Get a Contrast Matrix for Type I SS

Description

Usage

Value

Arguments

Author

Details

Examples