Description Usage Arguments Details Value See Also Examples

Returns a logical vector from a test of whether an object such as a matrix or VGLM object corresponds to a 'zero' assumption.

1 2 | ```
is.zero.matrix(object, ...)
is.zero.vglm(object, ...)
``` |

`object` |
an object such as a coefficient matrix of a |

`...` |
additional optional arguments. Currently unused. |

These functions test the effect of the `zero`

argument
on a `vglm`

object or the coefficient matrix
of a `vglm`

object.
The latter is obtained by `coef(vglmObject, matrix = TRUE)`

.

A vector of logicals, testing whether each linear/additive predictor
has the `zero`

argument applied to it.
It is `TRUE`

if that linear/additive predictor is
intercept-only, i.e., all other regression coefficients
are set to zero.

No checking is done for the intercept term at all, i.e., that it was estimated in the first place.

1 2 3 4 | ```
coalminers <- transform(coalminers, Age = (age - 42) / 5)
fit <- vglm(cbind(nBnW,nBW,BnW,BW) ~ Age, binom2.or(zero = NULL), coalminers)
is.zero(fit)
is.zero(coef(fit, matrix = TRUE))
``` |

VGAM documentation built on May 19, 2017, 10:21 a.m.

Questions? Problems? Suggestions? Tweet to @rdrrHQ or email at ian@mutexlabs.com.

Please suggest features or report bugs in the GitHub issue tracker.

All documentation is copyright its authors; we didn't write any of that.

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.