Linear Discriminant Analysis (LDA)
Definition
A supervised classification method that finds the linear combination of features that best separates known groups. In forensic geology it is used to classify a questioned sample into one of several source areas.
Related terms
- False-positive rate
- The proportion of non-mate comparisons (different fingers) on which an examiner reaches an identification conclusion; measured at approximately 0.1% in the Ulery...
- Likelihood ratio (LR)
- The ratio of two conditional probabilities: the probability of the observed evidence given the prosecution's hypothesis (same source), divided by the probability...
- Mahalanobis distance
- A multivariate distance measure that expresses the separation between two observations in units of the population standard deviation, accounting for covariance; used...
- Principal component analysis (PCA)
- A multivariate statistical method used in fire debris research to reduce chromatographic data matrices to principal components that capture major variance. Used...
- Reference population
- The set of samples representing the range of materials that could plausibly have produced the questioned sample, in the absence of the...
Explained in
- Statistical Comparison and the Reference Population ProblemA supervised classification method that finds the linear combination of features that best separates known groups. In forensic geology it is used to classify a...