fit_Fcontrasts: Fit F-contrasts for Linear Model

In bbuchsbaum/fmrireg: R package for the anlysis of fmri data

Fit F-contrasts for Linear Model

Description

This function calculates F-contrasts for a fitted linear model.

Usage

fit_Fcontrasts(lmfit, conmat, colind)

Arguments

lmfit	Fitted linear model object.
conmat	Contrast matrix.
colind	Column indices corresponding to the variables in the contrast matrix.

Value

A list containing the following elements:

• estimate: Estimated contrasts.

• se: Residual variance.

• stat: F-statistics for the contrasts.

• prob: Probabilities associated with the F-statistics.

• stat_type: Type of the statistics calculated.

Examples

data(mtcars)
lm_fit <- lm(mpg ~ wt + qsec + am, data = mtcars)
contrast_matrix <- matrix(c(0, -1, 1), nrow = 1, byrow = TRUE)
fit_Fcontrasts(lm_fit, contrast_matrix, c(2, 3))

bbuchsbaum/fmrireg documentation built on May 16, 2023, 10:56 a.m.