e1: Get a Contrast Matrix for Type I SS
In sasLM: 'SAS' Linear Model
e1 R Documentation
Get a Contrast Matrix for Type I SS
Description
Makes a contrast matrix for Type I SS using the forward Doolittle method.
Usage
e1(XpX, eps=1e-8)
Arguments
XpX
the crossproduct of a design or model matrix. This should have appropriate column names.
eps
A value less than this is considered zero.
Details
It makes a contrast matrix for Type I SS. If zapsmall is used, the result becomes less accurate.
Value
A contrast matrix for Type I SS.
Author(s)
Kyun-Seop Bae k@acr.kr
Examples
x = ModelMatrix(uptake ~ Plant + Type + Treatment + conc, CO2)
round(e1(crossprod(x$X)), 12)
sasLM documentation built on June 15, 2026, 9:07 a.m.
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| e1 | R Documentation |
Get a Contrast Matrix for Type I SS
Description
Makes a contrast matrix for Type I SS using the forward Doolittle method.
Usage
e1(XpX, eps=1e-8)
Arguments
XpX |
the crossproduct of a design or model matrix. This should have appropriate column names. |
eps |
A value less than this is considered zero. |
Details
It makes a contrast matrix for Type I SS. If zapsmall is used, the result becomes less accurate.
Value
A contrast matrix for Type I SS.
Author(s)
Kyun-Seop Bae k@acr.kr
Examples
x = ModelMatrix(uptake ~ Plant + Type + Treatment + conc, CO2)
round(e1(crossprod(x$X)), 12)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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