Nothing
init_coef <- function (sample_size,p){
#Tajima and Fu coefficients... and Achaz coefficients. Total <- 23 Most from Simonsen 1995*/
p <- rep(-1,24)
#an <- sum(1/1:(n-1))
#bn <- sum(1/1:((n-1)*(n-1)))
an <-0
bn <- 0.0
n <- sample_size
#schneller !!!!
if(n>1){
bn <- 1/((1:(n-1))*(1:(n-1)))
bn <- sum(bn)
an <- 1/(1:(n-1))
an <- sum(an)
}
#for(x in 1:(n-1)) {
# an <- an + 1.0/x
# bn <- bn + 1.0/(x*x)
#}
p[1] <- an
p[2] <- bn
# vt */
p[3] <- (2.0*(n*n + n + 3.0)/(9.0*n*(n-1.0)) -(n+2.0)/(an * n) + bn/(an * an)) / (an*an + bn)
# ut */
p[4] <- (( (n+1.0)/(3.0*(n-1.0)) - 1.0/an)/an) - p[3]
# vd* */
p[5] <- (bn/(an*an) - 2.0/n *(1.0 + 1.0/an - an + an/n) - 1.0/(n*n))/ (an*an + bn)
# ud* */
p[6] <- (((n-1.0)/n - 1.0/an) / an) - p[5]
#/* vf* */
p[7] <- (((2.0*n*n*n + 110.0 * n*n - 255.0 * n + 153.0)/ (9.0 * n * n * (n-1.0)) + (2.0*(n-1.0) *an)/ (n*n) - (8.0 * bn)/n)) / (an*an + bn)
#/* uf* */
p[8] <- (((4.0*n*n + 19.0*n + 3.0 - 12.0 * (n +1.0) * (an + 1.0/n))/ (3.0*n *(n-1.0))) / an) - p[7]
# vf* */
# p[7] <- (((2.0*n*n*n + 110.0 * n*n - 255.0 * n + 153.0) / (9.0 * n * n * (n-1.0)) +(2.0*(n-1.0)*an)/ (n*n) - (8.0 * bn)/n)) / (an*an + bn)
# uf* */
# p[8] <- (((4.0*n*n + 19.0*n + 3.0 - 12.0 * (n +1.0) * (an + 1.0/n)) / (3.0*n *(n-1.0))) / an) - p[7]
# cn */
cn <- 2.0 * (n*an-2.0*(n-1.0)) / ((n-1.0)*(n-2.0))
# vd */
p[9] <- 1.0 + (an*an/(bn+an*an)) * (cn - ((n+1.0)/(n-1.0)))
# ud* */
p[10] <- an -1.0 - p[9]
# vf */
p[11] <- (cn + (2.0*(n*n+n+3.0))/(9.0*n*(n-1.0)) - 2.0/(n-1.0)) / (an*an + bn)
# uf */
p[12] <- (1.0 + (n+1.0)/(3.0*(n-1.0)) - 4*(n+1.0) /((n-1.0)*(n-1.0)) * (an+(1.0/n) - 2.0*n/(n+1.0)))/ an - p[11]
# Achaz f */
p[13] <- (n - 2.0)/(n * (an - 1.0))
# Achaz f* */
p[14] <- (n - 3.0)/(an * (n - 1.0) - n)
# alfa_n */
p[15] <- p[13] * p[13] * (an - 1.0) + p[13] * (an * (4.0*(n+1.0))/((n-1.0)*(n-1.0)) - (2.0 *(n + 1.0)*(n + 2.0))/(n * (n-1.0))) -an * (8.0 * (n+1.0)/(n*(n-1.0)*(n-1.0))) +(n*n*n + n*n + 60.0*n + 12.0)/(3.0*n*n*(n-1.0))
# beta_n */
p[16] <- p[13] * p[13] * (bn + an * (4.0/((n - 1.0) * (n - 2.0))) - 4.0/(n-2.0)) +p[13] * (-an * (4.0*(n+2.0))/(n*(n-1.0)*(n-2.0)) - (n*n*n - 3.0*n*n - 16.0*n + 20.)/(n*(n-1.0)*(n-2.0))) +an * (8.0/(n*(n-1.0)*(n-2.0))) +2.0 * (n*n*n*n - n*n*n - 17.0*n*n - 42.0*n + 72.0)/(9.0*n*n*(n-1.0)*(n-2.0))
# alfa*_n */
p[17] <- p[14] * p[14] * (an - n/(n-1.0)) + p[14] * (an * 4.0 * (n+1.0)/((n-1.0)*(n-1.0)) - 2.0 * (n+3.0)/(n-1.0)) -an * (8.0*(n+1.0))/(n*(n-1.0)*(n-1.0)) +(n*n + n + 60.0)/(3.0*n*(n-1.0))
# beta*_n */
p[18] <- p[14] * p[14] * (bn - (2.0*n-1.0)/((n-1.0)*(n-1.0))) +p[14] * (bn * 8.0/(n-1.0) - an * 4.0/(n*(n-1.0)) - (n*n*n + 12.0*n*n - 35.0*n +18.0)/(n*(n-1.0)*(n-1.0))) -bn * 16.0/(n*(n-1.0)) +an * 8.0/(n*n*(n-1.0)) +2.0 * (n*n*n*n + 110.0*n*n - 255.0*n + 126.0)/(9.0*n*n*(n-1.0)*(n-1.0))
#b1*/
p[19] <-(n+1.0)/(3.0*(n-1.0))
#b2*/
p[20] <-2.0*(n*n + n + 3)/(9*n*(n-1))
#c1*/
p[21] <- p[19] - 1.0/p[1]
#c2*/
p[22] <-p[20] - (n+2.0)/(p[1]*n) + (p[2]/(p[1]*p[1]))
#e1*/
p[23] <-p[21]/p[1]
#e2*/
p[24] <-p[22]/(p[1]*p[1] + p[2])
return(p)
}
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