diagnosticsigt {ig} | R Documentation |
The function diagnosticsigt()
produces an index plot of total
local influence.
diagnosticsigt(x, kernel = "normal", mainTitle = "", yRange = NULL)
x |
Vector of observations. |
kernel |
Kernel of the pdf of the associated symmetrical distribution by
means of which the IGTD is obtained. The kernels:
"laplace" , "logistic" , "normal" and
"t" are available. |
mainTitle |
An overall title for the plot. |
yRange |
Limit for the y axis. |
The local influence diagnostics method (Cook, 1986) is used to evaluate the local influence by means of likelihood displacement.
diagnosticsigt()
gives an influence diagnostics through a graphical
plot for the IGTD from a sample of observations.
Víctor Leiva <victor.leiva@uv.cl; victor.leiva@yahoo.com>,
Hugo Hernández <hugo.hernandez.p@gmail.com> and
Antonio Sanhueza <asanhueza@ufro.cl>.
Sanhueza, A., Leiva, V., Balakrishnan, N. (2008). A new class of inverse Gaussian type distributions. Metrika (in press).
## Generates a sample from the IGTD with normal kernel x <- rigt(300, mu = 1.0, lambda = 1.0, kernel = "normal") ## Produces influence diagnostics for the IGTD with normal kernel diagnosticsigt(x, kernel = "normal")