iv {seedreg} | R Documentation |
Calculates the emergence or germination speed index according to Maguire (1962)
iv(data, trat, nrep, time)
data |
Data.frame containing the responses of the evaluations in separate columns side by side and without the columns with the identification of the factors |
trat |
Vector of treatments with n repetitions |
nrep |
Number of repetitions |
time |
Vector containing time |
Returns the vector with the index
Maguire JD (1962). Seed of germination - aid in selection and evaluation for seedling emergence and vigour. J Crop Sci 2:176-177.
data("substrate")
iv(substrate[,c(3:18)],
trat = substrate$Trat,
nrep = 4,
time = 1:16)