Nothing

```
#######################################
## Generalized logistic distribution ##
#######################################
## cumulative distribution function of generalized logistic distribution
pglogis <- function(q, location = 0, scale = 1, shape = 1, lower.tail = TRUE, log.p = FALSE)
{
x <- (q - location)/scale
if(log.p) {
if(lower.tail) {
shape * plogis(x, log.p = TRUE)
} else {
log(1 - plogis(x)^shape)
}
} else {
if(lower.tail) {
exp(shape * plogis(x, log.p = TRUE))
} else {
1 - plogis(x)^shape
}
}
}
## associated quantile function
qglogis <- function(p, location = 0, scale = 1, shape = 1, lower.tail = TRUE, log.p = FALSE)
{
q <- if(log.p) {
if(lower.tail) {
qlogis(p/shape, log.p = TRUE)
} else {
qlogis((-expm1(p))^(1/shape))
}
} else {
if(lower.tail) {
qlogis(log(p)/shape, log.p = TRUE)
} else {
qlogis((1 - p)^(1/shape))
}
}
location + q * scale
}
## associated probbility density function
dglogis <- function(x, location = 0, scale = 1, shape = 1, log = FALSE)
{
x <- (x - location)/scale
pdf <- log(shape) - log(scale) - x - (shape + 1) * log(1 + exp(-x))
if(log) pdf else exp(pdf)
}
## associated score function, i.e., gradient of dglogis(..., log = TRUE)
sglogis <- function(x, location = 0, scale = 1, shape = 1)
{
## scale observations
x <- (x - location)/scale
# derivatives of location
rval1 <- 1/scale - (shape + 1) * (1/scale * exp(-x))/(1 + exp(-x))
# derivatives of scale
rval2 <- -1/scale + x/scale - (shape + 1) * ((x/scale) * exp(-x))/(1 + exp(-x))
# derivatives of shape
rval3 <- 1/shape - log(1 + exp(-x))
rvalue <- cbind(rval1, rval2, rval3)
colnames(rvalue) <- c("location", "scale", "shape")
return(rvalue)
}
## random numbers via dumb inversion technique
rglogis <- function(n, location = 0, scale = 1, shape = 1) {
qglogis(runif(n), location = location, scale = scale, shape = shape)
}
```

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