infer_orientation_signs: Infer orientation signs for each observable indicator

In lpmec: Measurement Error Analysis and Correction Under Identification Restrictions

Infer orientation signs for each observable indicator

Description

This helper analyzes observable indicators and returns a numeric vector of 1 or -1 for use with the orientation_signs argument in lpmec. Each sign is chosen so that the correlation between the oriented indicator and either the outcome Y or the first principal component of the indicators is positive.

Usage

infer_orientation_signs(Y, observables, method = c("Y", "PC1"))

Arguments

Y	Numeric outcome vector. Only used when method = "Y".
observables	A matrix or data frame of binary observable indicators.
method	Character string specifying how to orient the indicators. "Y" orient each indicator so that its correlation with Y is positive. "PC1" orient each indicator so that its correlation with the first principal component of observables is positive. Default is "Y".

Value

A numeric vector of length ncol(observables) containing 1 or -1.

Examples

set.seed(1)
Y <- rnorm(10)
obs <- data.frame(matrix(sample(c(0,1), 20, replace = TRUE), ncol = 2))
infer_orientation_signs(Y, obs)

lpmec documentation built on Feb. 9, 2026, 5:07 p.m.