MortalitySmooth (version 1.0)

Mort2Dsmooth.update: Update a 2D Penalized-Poisson Iteration

Description

This is an internal function of package MortalitySmooth which update coefficients for penalized B-splines for two given smoothing parameters within the function Mort2Dsmooth.

Usage

Mort2Dsmooth.update(x, y, Z, offset, psi2, wei,
                    Bx, By, nbx, nby, RTBx, RTBy, P, a)

Arguments

x

Vector for the abscissa of data.

y

Vector for the ordinate of data.

Z

Matrix of counts response.

offset

Matrix with an a priori known component (optional).

wei

An optional matrix of weights to be used in the fitting process.

psi2

Overdispersion parameter.

Bx

B-splines basis for the x-axis.

By

B-splines basis for the y-axis.

nbx

Number of B-splines for the x-axis.

nby

Number of B-splines for the y-axis.

RTBx

Tensors product of B-splines basis for the x-axis.

RTBy

Tensors product of B-splines basis for the y-axis.

P

Penalty factor.

a

Coefficients (in a matrix).

Value

• A matrix of updated coefficients.

Details

Internal function used for updating a matrix coefficients of the B-splines in 2D Poisson penalized B-splines model.

See Also

Mort2Dsmooth.