coefvlm {VGAM} | R Documentation |
Extracts the estimated coefficients from VLM objects such as VGLMs.
coefvlm(object, matrix.out = FALSE, label = TRUE, colon = FALSE)
object |
An object for which the extraction of
coefficients is meaningful.
This will usually be a |
matrix.out |
Logical. If |
label |
Logical. If |
colon |
Logical. Explanatory variables which appear in more than one
linear/additive predictor are labelled with a colon,
e.g., |
This function works in a similar way to
applying coef()
to a lm
or glm
object.
However, for VGLMs, there are more options available.
A vector usually.
A matrix if matrix.out = TRUE
.
Thomas W. Yee
Yee, T. W. and Hastie, T. J. (2003) Reduced-rank vector generalized linear models. Statistical Modelling, 3, 15–41.
zdata <- data.frame(x2 = runif(nn <- 200)) zdata <- transform(zdata, pstr0 = logit(-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)