Data Awesome https://data-awesome.com/blog Writing on data analytics, Alteryx, AI and the career around them, from ten years leading analytics in airline operations. en-us racine.isacar@gmail.com (Isacar Racine) racine.isacar@gmail.com (Isacar Racine) Sat, 01 Aug 2026 00:00:00 GMT https://data-awesome.com/blog/division-prueba-unica-comparar-modelos Una sola división de prueba no basta para comparar modelos https://data-awesome.com/blog/division-prueba-unica-comparar-modelos Una sola división train/test puede hacer que un modelo se vea mejor de lo que es y otro peor, en el mismo experimento. Así se ve eso con números reales. Sat, 01 Aug 2026 00:00:00 GMT racine.isacar@gmail.com (Isacar Racine) model-diagnosticsstatisticsmachine-learning https://data-awesome.com/blog/single-test-split-model-comparison A Single Test Split Isn't Enough to Compare Models https://data-awesome.com/blog/single-test-split-model-comparison One train/test split can make one model look better than it is and another look worse, in the same experiment. Here's what that looks like with real numbers. Sat, 01 Aug 2026 00:00:00 GMT racine.isacar@gmail.com (Isacar Racine) model-diagnosticsstatisticsmachine-learning https://data-awesome.com/blog/variable-selection-regularization Variable Selection, Ridge, Lasso, Elastic Net https://data-awesome.com/blog/variable-selection-regularization Ridge, lasso and elastic net returned identical test error, to the last digit. The reason is a mistake hiding in a workflow you have copied. Mon, 06 Apr 2026 00:00:00 GMT racine.isacar@gmail.com (Isacar Racine) regressionmachine-learningstatisticsr https://data-awesome.com/blog/ai-analytics-guide AI in Analytics: How to Leverage Machine Learning for Data-Driven Decisions https://data-awesome.com/blog/ai-analytics-guide Discover how AI and machine learning transform analytics. Learn practical applications, tools, and strategies to implement AI in your analytics workflow and make smarter business decisions. Sat, 28 Feb 2026 00:00:00 GMT racine.isacar@gmail.com (Isacar Racine) aimachine-learninganalytics https://data-awesome.com/blog/ai-analytics-guia IA en Análisis: Cómo Usar Machine Learning para Decisiones Basadas en Datos https://data-awesome.com/blog/ai-analytics-guia Descubre cómo IA y machine learning transforman el análisis. Aprende aplicaciones prácticas, herramientas y estrategias para implementar AI en tu flujo de análisis y tomar decisiones de negocio más inteligentes. Mon, 20 Jan 2025 00:00:00 GMT racine.isacar@gmail.com (Isacar Racine) aimachine-learninganalytics