Reconstruct a matrix from a flattened upper triangle vector — rs_upper_triangle_to

This function takes a flattened vector of the upper triangle from a symmetric matrix (think correlation matrix) and reconstructs the full dense matrix for you.

Usage

rs_upper_triangle_to_dense(data, shift, n)

Arguments

data: Numeric vector. The vector of for example correlation coefficients that you want to use to go back to a dense matrix.
shift: Boolean. If TRUE, data excludes the diagonal and the diagonal is set to 1. If FALSE, data includes the diagonal.
n: Integer. Original dimension (i.e., ncol/nrow) of the matrix to be reconstructed.

Value

The dense R matrix.