Description Usage Arguments Details Value Note Author(s) References See Also Examples
internal use only
1 |
x |
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y |
|
mar1 |
|
mar2 |
|
a |
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b |
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... |
internal use only
internal use only
internal use only
P. Rakonczai
internal use only
internal use only
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | ##---- Should be DIRECTLY executable !! ----
##-- ==> Define data, use random,
##-- or do help(data=index) for the standard data sets.
## The function is currently defined as
function (x, y, mar1 = c(0, 1, 0.1), mar2 = c(0, 1, 0.1), a = 2,
b = 1.5, ...)
{
mu = function(x, y) ((1/x)^(2 * a) + 2 * (1 + b) * (1/x/y)^(a) +
(1/y)^(2 * a))^(1/2/a)
param = as.numeric(c(mar1, mar2, a, b))
mux = param[1]
muy = param[4]
sigx = param[2]
sigy = param[5]
gamx = param[3]
gamy = param[6]
a = param[7]
b = param[8]
Hxy = NULL
error = FALSE
if (sigx < 0 | sigy < 0 | a < 1 | b <= -1 | (b > (2 * a -
2)))
error = TRUE
if (!error) {
Hxy = NA
tx = (1 + gamx * (x - mux)/sigx)^(1/gamx)
ty = (1 + gamy * (y - muy)/sigy)^(1/gamy)
tx0 = (1 + gamx * (-mux)/sigx)^(1/gamx)
ty0 = (1 + gamy * (-muy)/sigy)^(1/gamy)
c0 = -mu(tx0, ty0)
Hxy = 1/c0 * (mu(tx, ty) - mu(pmin(tx, tx0), pmin(ty,
ty0)))
}
else stop("invalid parameter(s)")
Hxy
}
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