env_stratification( .data, env, gen, resp, use = "complete.obs", mineval = 1, verbose = TRUE )
.data | The dataset containing the columns related to Environments, Genotypes, replication/block and response variable(s) |
---|---|
env | The name of the column that contains the levels of the environments. |
gen | The name of the column that contains the levels of the genotypes. |
resp | The response variable(s). To analyze multiple variables in a
single procedure use, for example, |
use | The method for computing covariances in the presence of missing
values. Defaults to |
mineval | The minimum value so that an eigenvector is retained in the factor analysis. |
verbose | Logical argument. If |
An object of class env_stratification
which is a list with one
element per analyzed trait. For each trait, the following values are given.
data
The genotype-environment means.
cormat
: The correlation matrix among the environments.
PCA
: The eigenvalues and explained variance.
FA
: The factor analysis.
env_strat
: The environmental stratification.
mega_env_code
: The environments within each mega-environment.
mega_env_stat
: The statistics for each mega-environment.
KMO
: The result for the Kaiser-Meyer-Olkin test.
MSA
: The measure of sampling adequacy for individual variable.
communalities_mean
: The communalities' mean.
initial_loadings
: The initial loadings.
Murakami, D.M.D., and C.D.C. Cruz. 2004. Proposal of methodologies for environment stratification and analysis of genotype adaptability. Crop Breed. Appl. Biotechnol. 4:7-11.
Tiago Olivoto, tiagoolivoto@gmail.com
# \donttest{ library(metan) model <- env_stratification(data_ge, env = ENV, gen = GEN, resp = everything()) gmd(model)#>#>#> # A tibble: 28 x 7 #> TRAIT ENV MEGA_ENV MEAN MIN MAX CV #> <chr> <chr> <chr> <dbl> <dbl> <dbl> <dbl> #> 1 GY E1 ME1 2.52 1.97 2.90 13.3 #> 2 GY E10 ME1 2.18 1.54 2.57 14.4 #> 3 GY E11 ME1 1.37 0.899 1.68 16.4 #> 4 GY E12 ME1 1.61 1.02 2 20.3 #> 5 GY E13 ME1 2.91 1.83 3.52 16.8 #> 6 GY E5 ME1 3.91 3.37 4.81 10.7 #> 7 GY E3 ME2 4.06 3.43 4.57 8.22 #> 8 GY E6 ME2 2.66 2.34 2.98 7.95 #> 9 GY E14 ME3 1.78 1.43 2.06 11.7 #> 10 GY E8 ME3 2.54 2.05 2.88 10.5 #> # ... with 18 more rows# }