coxph.wtest

0th

Percentile

Compute a quadratic form

This function is used internally by several survival routines. It computes a simple quadratic form, while properly dealing with missings.

Keywords
survival
Usage
coxph.wtest(var, b, toler.chol = 1e-09)
Arguments
var

variance matrix

b

vector

toler.chol

tolerance for the internal cholesky decomposition

Details

Compute b' V-inverse b. Equivalent to sum(b * solve(V,b)), except for the case of redundant covariates in the original model, which lead to NA values in V and b.

Value

a real number

Aliases
  • coxph.wtest
Documentation reproduced from package survival, version 3.1-8, License: LGPL (>= 2)

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