Thennarasu's stability statistics — Thennarasu • metan

Performs a stability analysis based on Thennarasu (1995) statistics.

Usage

Thennarasu(.data, env, gen, resp, verbose = TRUE)

Arguments

.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, resp = c(var1, var2, var3).
verbose: Logical argument. If verbose = FALSE the code will run silently.

Value

An object of class Thennarasu, which is a list containing the results for each variable used in the argument resp. For each variable, a tibble with the columns GEN, N1, N2, N3 and N4 is returned.

References

Thennarasu, K. 1995. On certain nonparametric procedures for studying genotype x environment interactions and yield stability. Ph.D. thesis. P.J. School, IARI, New Delhi, India.

Author

Tiago Olivoto tiagoolivoto@gmail.com

Examples

# \donttest{
library(metan)
out <- Thennarasu(data_ge, ENV, GEN, GY)
#> Evaluating trait GY |============================================| 100% 00:00:00 

print(out)
#> Variable GY 
#> ---------------------------------------------------------------------------
#> Thennarasu's stability indexes
#> ---------------------------------------------------------------------------
#> # A tibble: 10 × 11
#>    GEN       Y   Y_R    N1  N1_R    N2  N2_R    N3  N3_R     N4  N4_R
#>    <chr> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>  <dbl> <dbl>
#>  1 G1     2.60     6  2.57   8   0.367     5 0.429     4 0        1.5
#>  2 G10    2.47    10  3.71  10   0.531     7 0.577     7 0.0032   4.5
#>  3 G2     2.74     3  2.43   5.5 0.540     8 0.634     8 0.014    8  
#>  4 G3     2.96     2  2      2.5 0.667     9 0.862     9 0.0085   6  
#>  5 G4     2.64     5  1.93   1   0.321     1 0.402     2 0.0147   9  
#>  6 G5     2.54     7  2.71   9   0.339     2 0.384     1 0        1.5
#>  7 G6     2.53     8  2.43   5.5 0.347     3 0.411     3 0.0032   4.5
#>  8 G7     2.74     4  2.29   4   0.508     6 0.564     6 0.0022   3  
#>  9 G8     3.00     1  2      2.5 1        10 1.12     10 0.0149  10  
#> 10 G9     2.51     9  2.5    7   0.357     4 0.436     5 0.0096   7  
#> ---------------------------------------------------------------------------
#> 
#> 
# }