ipdmeta (version 1.1)

ci: Confidence Interval for linear combination of parameter estimates.

Description

Returns point-estimate for transformation of linear combination of parameter estimates.

Usage

ci(C,estimates,variance,alpha=.05,f=function(x){exp(x)})

Arguments

C

Vector or matrix of linear combinations, if matrix linear combinations are by row.

estimates

Vector of parameter estimates

variance

Matrix of variances for estimates

alpha

Significance level for normal-based CI

f

Function for the parameter transformation at CI endpoints

Value

• List of transformed point-estimate and CI.

Details

If x is a matrix, then the ci function is applied by row.

Examples

data(cars)
fit <- lm(dist~speed,cars)

#AVERAGE DISTANCE GIVEN SPEED OF 10

ci(matrix(c(1,10),1),coef(fit),vcov(fit),f=function(x){x})