kwstat/stattools

R code for the analysis of field experiments data

StatTools

IMPORTANT NOTE: Most of the code here is moving to the R package st4gi. This repo is not updated anymore.

Tools for the analysis of field experiments data (mainly R code). To use these tools you must download all the R functions in your working directory. If you are new to R, you will need to install the software first. Download the last version of R from here.

AMMI

Set of functions to run AMMI (Gollob, H. R., 1968).

CheckConsis

Set of rules to check for consistency of sweetpotato field experiments data in R. Data labels must be defined as specified in the PROCEDURES FOR THE EVALUATION AND ANALYSIS OF SWEETPOTATO TRIALS document.

CheckData

Set of functions to check experimental data. These functions are needed to check data for posterior analysis.

GoodDataPractices

Some recommendations for good data management and statistical analysis. I hope these recommendations will help you to save time and minimize the number of mistakes.

IndexSelection

Proposed Selection Indices for Applied Breeding Programs.

MeansPlot

An alternative to the controversial dynamite plots.

MissValEst

Set of functions to estimate missing values for field experiments data.

RegStab

Function to run the regression stability analysis (Yates and Cochran, 1938, Finlay and Wilkinson, 1963).

Resp2Selection

Set of scripts to find the optimum number of replications to get the maximum response to selection.

Tai

Function to perform the Tai stability analysis (Tai, G. C. C., 1971).