Related Experiment Video
Updated: Jan 23, 2026

Basics of Multivariate Analysis in Neuroimaging Data
Published on: July 24, 2010
Assessing the effect of season, montanera length and sampling location on Iberian pig fat by compositional data
Antonio Garrido-Fernández1, Manuel León-Camacho2
1Food Biotechnology Department, Instituto de la Grasa, Campus Universitario Pablo de Olavide, Building, 46. Ctra, Sevilla-Utrera, km 1, 41013 Sevilla, Spain.
Abstract:
The work studies the effect of season, montanera length, and sampling location on the Iberian pig fat, using compositional data (CoDa) analysis and standard statistics. CoDa variation array and logratios involving C18:3: (C18:3/C17:1), (C18:3/C20:0), and (C18:3/18:0) as well as the ilr balances (coordinates), based on C18:3, C17:1, and C20:0, showed the highest variances. Discriminant Analysis (DA) led to similar (conventional/coordinates) correct assignations regarding seasons (69/70%), montanera length (71/70%) and sampling location (68/67%). Re-analyzing the subcomposition of only the major fatty acids (FAs), led to slightly poorer results; therefore, the removed FAs might play a role in segregation. Results are in line with those from other authors and could indicate a partial capacity of pigs to control their FA profiles. Overall, CoDa analysis provided useful information on data variability, the effects of factors and, after conversion into coordinates, allowed applying standard statistics while being respectful with the compositional sampling space.
Related Concept Videos
Statistical Software for Data Analysis and Clinical Trials
Selected Data About Geographic Locations
Bioequivalence Data: Statistical Interpretation
Statistical Methods for Analyzing Epidemiological Data
Statistical Analysis: Overview
One of the most commonly used statistical quantifiers is the mean, which is the ratio between the sum of the numerical values of all results and the...
Statistical Analysis System (SAS)
Applications: SAS finds applications in numerous fields, including healthcare for clinical trial analysis, finance for risk assessment, marketing for customer data analysis, and...

