metap (version 1.0)

invt: Combine p values using inverse t method

Description

Combine p values using the inverse t method

Usage

invt(p, k, data = NULL, subset = NULL, na.action = na.fail)
# S3 method for invt
print(x, ...)

Arguments

p

A vector of \(p\)-values

k

A vector of degrees of freedom to use, see details

data

Optional data frame containing variables

subset

Optional vector of logicals to specify a subset of the \(p\)-values

na.action

A function indicating what should happen when data contains NAs

x

An object of class ‘invt’

...

Other arguments to be passed through

Value

An object of class ‘invt’ and ‘metap’, a list with entries

z

Value of z

p

Associated p-value

validp

The input vector with the illegal values removed

Details

Defined as $$\frac{\sum_{i=1}^n t_{k_i}(p_i)}% {\sqrt{\sum_{i=1}^n \frac{k_i}{k_i - 2}}}% > z(\alpha)% $$

If k is a single value it is used for all the p of which there are n. If any value of \(k<1\) then the corresponding p is not included.

The values of \(p\) should be such that \(0<p\le{}1\) and a warning is given if that is not true. An error is given if possibly as a result of deletions fewer than two studies remain.

The plot method for class ‘metap’ calls schweder on the valid \(p\)-values.

References

becker94metap

Examples

# NOT RUN {
data(beckerp)
invt(beckerp, 50)
# }