optimumplotsize {biotools} | R Documentation |
Maximum Curvature Point for Optimum Plot Size
Description
The Meier & Lessman (1971) method to determine the maximum curvature point for optimum plot size as a function of the experimental coefficient of variation.
Usage
optimumplotsize(a, b)
Arguments
a |
a parameter estimate of the plot size model; see |
b |
a parameter estimate of the plot size model; see |
Value
The (approximated) optimum plot size value.
Author(s)
Anderson Rodrigo da Silva <anderson.agro@hotmail.com>
References
Meier, V. D. & Lessman, K. J. (1971) Estimation of optimum field plot shape and size for testing yield in Crambe abyssinia Hochst. Crop Sci., 11:648-650.
See Also
Examples
ps <- c(1, 2, 3, 4, 6, 8, 12)
cv <- c(35.6, 29, 27.1, 25.6, 24.4, 23.3, 21.6)
out <- fitplotsize(plotsize = ps, CV = cv)
plot(cv ~ ps)
curve(coef(out)[1] * x^(-coef(out)[2]), add = TRUE)
optimumplotsize(a = coef(out)[1], b = coef(out)[2])
# End (not run)
[Package biotools version 4.2 Index]