Conveniently convert some columns of a <code>data.frame</code> into factors.

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

af function

<dl> <dt>DataFrame</dt>
<dd>a <code>data.frame</code></dd> <dt>Cols</dt>
<dd>column names or indices to be converted</dd></dl>

Arguments

Author

Convert some columns of a data.frame to factors — af

<dl>

 <dt>DataFrame</dt>
<dd>a <code>data.frame</code></dd>

 <dt>Cols</dt>
<dd>column names or indices to be converted</dd>

</dl>

af: Convert some columns of a data.frame to factors

Description

Usage

Value

Arguments

Author

Details