sommer (version 2.9)

blocker: Applying postblocking in a field

Description

The blocker function takes a dataframe that contains columns indicating x and y coordinates and use them to create blocking with different numbers. For example, a square field with no blocks after applying the function will have several new columns for different blockings that are sequential, i.e. 2 blocks in one direction, then 4 blocks by blocking in the other direction and so on.

Usage

blocker(x,rows="ROWS",ranges="RANGES",by, char=FALSE)

Arguments

x

a dataframe with 2 obligatory columns; rows and ranges which can have different names and can be matched with the next arguments.

rows

the name of the numeric column that indicates one direction in the field.

ranges

the name of the numeric column that indicates the other direction in the field.

by

optional argument to indicate the name of the column of the dataframe x that indicates the environments so the field is filled by environment.

char

a TRUE/FALSE value indicating if the blocking column should be returned in a character class instead of numeric.

Value

$fin

a new dataframe with new columns for different blocking proposals.

References

Fikret Isik. 2009. Analysis of Diallel Mating Designs. North Carolina State University, Raleigh, USA.

Covarrubias-Pazaran G (2016) Genome assisted prediction of quantitative traits using the R package sommer. PLoS ONE 11(6): doi:10.1371/journal.pone.0156744

See Also

The core functions of the package mmer and mmer2

Examples

# NOT RUN {
  
  ####=========================================####
#### For CRAN time limitations most lines in the 
#### examples are silenced with one '#' mark, 
#### remove them and run the examples using
#### command + shift + C |OR| control + shift + C
####=========================================####
data(CPdata)
CPpheno <- CPdata$pheno#[,-c(1:4)]
CPgeno <- CPdata$geno
#### look at the data
head(CPpheno)
#### fill the design
gg <- fill.design(x=CPpheno, rows="Row",ranges="Col")
head(gg)
#### apply the postblocking 
gg2 <- blocker(x=gg, rows="Col",ranges="Row", char = TRUE)
head(gg2)
#### now you can use them in your mixed models

# }