RDWW

This data set are about the ratio of dry to wet wheat of four different blocks and four times of nitrogen applied: None, Early, Middle, and Late.
The test of interaction between the blocks and the level of nitrogen applied is of interest.

There are several non-functional-form-based interaction tests for testing interaction in unreplicated two-way layouts. However, no single test can detect all patterns of possible interaction and the tests are sensitive to a particular pattern of interaction. This package combines six non-functional-form-based interaction tests for testing additivity. These six tests were proposed by Boik (1993) <doi:10.1080/02664769300000004>, Piepho (1994), Kharrati-Kopaei and Sadooghi-Alvandi (2007) <doi:10.1080/03610920701386851>, Franck et al. (2013) <doi:10.1016/j.csda.2013.05.002>, Malik et al. (2016) <doi:10.1080/03610918.2013.870196> and Kharrati-Kopaei and Miller (2016) <doi:10.1080/00949655.2015.1057821>. The p-values of these six tests are combined by Bonferroni, Sidak, Jacobi polynomial expansion, and the Gaussian copula methods to provide researchers with a testing approach which leverages many existing methods to detect disparate forms of non-additivity. This package is based on the following published paper: Shenavari and Kharrati-Kopaei (2018) "A Method for Testing Additivity in Unreplicated Two-Way Layouts Based on Combining Multiple Interaction Tests". In addition, several sentences in help files or descriptions were copied from that paper.

Hossein Haghbin

combinIT

A Combined Interaction Test for Unreplicated Two-Way Tables

Zahra Shenavari

Mahmood Kharrati-Kopaei

Seyed Morteza Najibi

RDWW function

A matrix with four rows (Blocks) and four columns (Nitrogen Applied):<dl>
 <dt>Row1</dt>
<dd>Block1</dd> <dt>Row2</dt>
<dd>Block2</dd> <dt>Row3</dt>
<dd>Block3</dd> <dt>Row4</dt>
<dd>Block4</dd> <dt>Column1</dt>
<dd>None</dd> <dt>Column2</dt>
<dd>Early</dd> <dt>Column3</dt>
<dd>Middle</dd> <dt>Column4</dt>
<dd>Late</dd>
</dl>

Format

Ratio of dry to wet wheat (RDWW). — RDWW

A matrix with four rows (Blocks) and four columns (Nitrogen Applied):<dl>
 <dt>Row1</dt>
<dd>Block1</dd>

 <dt>Row2</dt>
<dd>Block2</dd>

 <dt>Row3</dt>
<dd>Block3</dd>

 <dt>Row4</dt>
<dd>Block4</dd>

 <dt>Column1</dt>
<dd>None</dd>

 <dt>Column2</dt>
<dd>Early</dd>

 <dt>Column3</dt>
<dd>Middle</dd>

 <dt>Column4</dt>
<dd>Late</dd>


</dl>

RDWW: Ratio of dry to wet wheat (RDWW).

Description

Arguments

Format

References