multivar_kernel_LR: Calculates likelihood ratio based on MVKD

In justinjhlo/fvclrr: Likelihood Ratio Calculation and Testing in Forensic Voice Comparison

Calculates likelihood ratio based on MVKD

Description

This function is in part an adaptation of Morrison, G.S. (2007). Matlab implementation of Aitken & Lucy\'s (2004) forensic likelihood-ratio software using multivariate-kernel-density estimation. [Software]. (http://geoff-morrison.net/#MVKD) For details of how MVKD works, see Aitken, C.G.G. & Lucy, D. (2004). Evaluation of trace evidence in the form of multivariate data. Applied Statistics, 54, 109-122.

Usage

multivar_kernel_LR(sus_data, off_data, bg, bg_stat = NULL)

Arguments

sus_data	A matrix containing all suspect data to be compared
off_data	A matrix containing all offender data to be compared
bg	A data frame that contains all data in the background model. The first column identifies the speaker.
bg_stat	(Optional) Data frame of pre-calculated means and covariance matrices. Avoid providing your own bg_stat at all cost, because it will be generated within if left blank. It exists primarily for use in conjunction with MVKD_loop(), which will generate it in prior to save computation time.

Value

Numeric. The log-likelihood ratio.

justinjhlo/fvclrr documentation built on June 27, 2022, 11:19 a.m.