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Legendre polynomials of order 'n' are created given a vector 'x' and normalized to lay between values u and v.
leg(x,n=1,u=-1,v=1, intercept=TRUE, intercept1=FALSE)
numeric vector to be used for the polynomial.
order of the Legendre polynomials.
lower bound for the polynomial.
upper bound for the polynomial.
a TRUE/FALSE value indicating if the intercept should be included.
a TRUE/FALSE value indicating if the intercept should have value 1 (is multiplied by sqrt(2)).
an Legendre polynomial matrix of order n.
Covarrubias-Pazaran G (2016) Genome assisted prediction of quantitative traits using the R package sommer. PLoS ONE 11(6): doi:10.1371/journal.pone.0156744
The core functions of the package mmer
# NOT RUN {
x <- sort(rep(1:3,100))
# you need to install the orthopolynom library
# leg(x, n=1)
# leg(x, n=2)
# see dataset data(DT_legendre) for a random regression modeling example
# }
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