lll {ig} | R Documentation |
Compute the second analitical derivative of the loglikelihood with respect to lambda.
lll(theta, x, kernel = "normal", nu = 1)
theta |
Vector of parameters mu and lambda . |
x |
Vector of observations. |
kernel |
Kernel of the pdf of the associated symmetrical distribution by means of which the IGTD is obtained. |
nu |
Additional parameter of the IGTD when the t kernel is used. |
Víctor Leiva <victor.leiva@uv.cl>, Hugo Hernández <hugo.hernandez@msn.com>, and Antonio Sanhueza <asanhue@ufro.cl>.
Sanhueza, A., Leiva, V. and Balakrishnan, N. (2007). A new class of inverse Gaussian type distributions. Metrika (in press).