R: Response Variable Extracted

depvar {VGAM} | R Documentation

## Response Variable Extracted

### Description

A generic function that extracts the response/dependent variable from objects.

### Usage

    depvar(object, ...)

### Arguments

`object` | An object that has some response/dependent variable.
`...` | Other arguments fed into the specific methods function of the model. In particular, sometimes `type = c("lm", "lm2")` is available, in which case the first one is chosen if the user does not input a value. The latter value corresponds to argument `form2`, and sometimes a response for that is optional.

### Details

By default this function is preferred to calling `fit@y`, say.

### Value

The response/dependent variable, usually as a matrix or vector.

### Author(s)

Thomas W. Yee

### See Also

`model.matrix`, `vglm`.

### Examples

    pneumo <- transform(pneumo, let = log(exposure.time))
    (fit <- vglm(cbind(normal, mild, severe) ~ let, propodds, data = pneumo))
    fit@y        # Sample proportions (not recommended)
    depvar(fit)  # Better than using fit@y; dependent variable (response)
    weights(fit, type = "prior")  # Number of observations

[Package VGAM version 1.0-3 Index]