[Stable]

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

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 x 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  
#> ---------------------------------------------------------------------------
#> 
#> 
# }