v1.4.0

Bug fixes

• Factor columns can now have custom names rather than ENV, GEN, and REP only (#2).

New functions

• gmd() a shortcut to get_model_data()
• gtb() to generate a genotype-by-trait biplot.
• gamem_met() to analyze genotypes in multi-environment trials using mixed- or random-effect models allowing unbalanced data. Thanks to @EderOliveira for his e-mail.
• has_class() to check if a class exists.
• impute_missing_val() to impute missing values in a two-way table based on Expectation-Maximization algoritms.
• non_collinear_vars() to select a set of predictors with minimal multicollinearity.
• replace_na() to replace NA values quicly.
• random_na() to generate random NA values based on a desired proportion.

Minor changes

• gge(), performs_ammi(), waas(), and waasb() now handle with unbalanced data by implementing a low-rank matrix approximation using singular value decomposition to impute missing entires. Imputation generates a warning message.
• NA values are checked and removed with a warning when computing stability indexes. Thanks to @MdFarhad for alerting me.
• New argument plot_res in path_coeff() to create a residual plot of the multiple regression model.
• Update the citation file to include the published official reference.
• Argument verbose deprecated in functions anova_ind() and split_factors()
• Argument rep deprecated in functions Fox(), Huehn(), superiority(), and Thennarasu().
• Deprecated argument means_by removed in functions can_corr() and clustering().
• Deprecated argument verbose removed in functions colindiag() and split_factors().
• Deprecated argument values removed in functions desc_stat() and find_outliers().
• Deprecated argument var removed in function desc_wider().
• Remove dependency on lattice by using ggplot2 in plot.resp_surf().
• An up-to-date cheat sheet was included.