g2inv

A generalized inverse is usually not unique. Some programs use this algorithm to get a unique generalized inverse matrix. This uses the SWEEP operator and works for non-square matrices also.

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

g2inv function

<dl> <dt>A</dt>
<dd>a matrix to be inverted</dd> <dt>eps</dt>
<dd>A value less than this is considered zero.</dd></dl>

Arguments

Author

Generalized type 2 inverse matrix, g2 inverse — g2inv

<dl>

 <dt>A</dt>
<dd>a matrix to be inverted</dd>

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

</dl>

g2inv: Generalized type 2 inverse matrix, g2 inverse

Description

Usage

Value

Arguments

Author

Details

References

See Also

Examples