ge_stats() computes parametric and non-parametric stability statistics
given a data set with environment, genotype, and block factors.
The dataset containing the columns related to Environments, Genotypes, replication/block and response variable(s).
The name of the column that contains the levels of the environments.
The name of the column that contains the levels of the genotypes.
The name of the column that contains the levels of the replications/blocks.
The response variable(s). To analyze multiple variables in a
single procedure use, for example,
Logical argument. If
The probability error assumed.
The function computes the statistics and ranks for the following stability indexes.
"Y" (Response variable),
"CV" (coefficient of variation)
"ACV" (adjusted coefficient of variation calling
POLAR (Power Law Residuals, calling
"Var" (Genotype's variance)
"Shukla" (Shukla's variance, calling
"Wi_g", "Wi_f", "Wi_u" (Annichiarrico's genotypic
confidence index for all, favorable and unfavorable environments,
Annicchiarico() internally )
"Ecoval" (Wricke's ecovalence,
"Sij" (Deviations from the joint-regression analysis) and
(R-squared from the joint-regression analysis, calling
"ASTAB" (AMMI Based Stability Parameter),
"ASI" (AMMI Stability
"ASV" (AMMI-stability value),
"AVAMGE" (Sum Across Environments
of Absolute Value of GEI Modelled by AMMI ),
"Da" (Annicchiarico's D
"Dz" (Zhang's D Parameter),
"EV" (Sums of the
Averages of the Squared Eigenvector Values),
"FA" (Stability Measure
Based on Fitted AMMI Model),
"MASV" (Modified AMMI Stability Value),
"SIPC" (Sums of the Absolute Value of the IPC Scores),
Value of the Relative Contribution of IPCs to the Interaction),
(Weighted average of absolute scores), calling
"HMGV" (Harmonic mean of the genotypic value),
performance of the genotypic values),
"HMRPGV" (Harmonic mean of the
relative performance of the genotypic values), by calling
"Pi_a", "Pi_f", "Pi_u" (Superiority indexes for all, favorable and
unfavorable environments, respectively, calling
"Gai" (Geometric adaptability index, calling
"S1" (mean of the absolute rank differences of a genotype over the n
"S2" (variance among the ranks over the k environments),
"S3" (sum of the absolute deviations),
"S6" (relative sum of squares of
rank for each genotype), by calling
"N4" (Thennarasu"s statistics, calling
Thennarasu() internally ).
An object of class
ge_stats which is a list with one data
frame for each variable containing the computed indexes.
Tiago Olivoto firstname.lastname@example.org
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