VGAM (version 1.1-14)

coefvlm: Extract Model Coefficients

Description

Extracts the estimated coefficients from VLM objects such as VGLMs.

Usage

coefvlm(object, matrix.out = FALSE, label = TRUE, colon = FALSE, ...)

Value

A vector usually. A matrix if matrix.out = TRUE.

Details

This function works in a similar way to applying coef() to a lm or glm object. However, for VGLMs, there are more options available.

References

Yee, T. W. and Hastie, T. J. (2003). Reduced-rank vector generalized linear models. Statistical Modelling, 3, 15--41.

See Also

vglm, coefvgam, coef.

Examples

zdata <- data.frame(x2 = runif(nn <- 200))
zdata <- transform(zdata, pstr0  = logitlink(-0.5 + 1*x2, inverse = TRUE),
                          lambda =   loglink( 0.5 + 2*x2, inverse = TRUE))
zdata <- transform(zdata, y2 = rzipois(nn, lambda, pstr0 = pstr0))

fit2 <- vglm(y2 ~ x2, zipoisson(zero = 1), data = zdata, trace = TRUE)
coef(fit2, matrix = TRUE)  # Always a good idea
coef(fit2)
coef(fit2, colon = TRUE)