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sigma0 <- sqrt((6. * var(maxima))/pi) What does the '.' do here? -- View this message in context: http://www.nabble.com/extra-.-tp25073255p25073255.html Sent from the R help mailing list archive at Nabble.com.

I am assuming the variable out is the output parameter. However, I don't understand what is out[1+xi*xx>0]? Can someone explain this to me? Thanks in advance, Chen dGEV <- function(x, xi, mu = 0, sigma = 1, logvalue=FALSE) { xx <- (x-mu)/sigma #use the new dGumbel which passes mu and sigma: #if (xi==0) out <- dGumbel(xx,logvalue=TRUE)-log(sigma) if (xi==0) {

I got some R code that I don't understand. Question as comment in code //where is t comming from, what is phi inverse rAC <- function(name, n, d, theta){ #generic function for Archimedean copula simulation illegalpar <- switch(name, clayton = (theta < 0), gumbel = (theta < 1), frank = (theta < 0), BB9 = ((theta[1] < 1) | (theta[2] < 0)), GIG = ((theta[2] < 0) |

What is 1. par.ests <- optimfit$par 2. fisher <- hessb(negloglik, par.ests, maxvalue=maxima); 3. varcov <- solve(fisher); 4. par.ses <- sqrt(diag(varcov)); Thanks a lot, fit.GEV <- function(maxima) { sigma0 <- sqrt((6. * var(maxima))/pi) mu0 <- mean(maxima) - 0.57722 * sigma0 xi0 <- 0.1 theta <- c(xi0, mu0, sigma0) #10/5/2007: removed assign() for maxima.nl