The Jose M Sallan static website

• Cross Validation of Time Series Models

  2024/11/12

• Latin Hypercube Sampling

  2024/11/01

• Triangular and PERT Probability Distributions

  2024/10/11

• Examples of Visualizations with ggplot

  2024/10/08

• Analyzing a Lottery with Monte Carlo Simulation

  2024/10/04

• A Faceted Horizontal Bar Chart

  2024/09/05

• Environmental Impact of the Barcelona F1 Road Show

  2024/08/02

• Impacte ambiental del F1 Road Show a Barcelona

  2024/07/22

• Coloring an Intricate Map with Graph Coloring Algorithms

  2024/07/10

• Node Coloring with Linear Programming

  2024/06/20

• Pareto Front in Multicriteria Optimization

  2024/06/13

• Using Recursion to Generate Feature Interaction Terms

  2024/05/31

• Examining the Central Limit Theorem with purrr

  2024/05/27

• Prim's Algorithm for the Minimum Spanning Tree

  2024/05/18

• 2-opt Moves in the Travelling Salesman Problem

  2024/05/08

• Solving the Maximum Flow Problem

  2024/03/22

• Introducing Confidence Intervals

  2024/03/08

• A Syllabus for Tabular Data Analytics

  2024/02/19

• Getting Barcelona Sunset and Sunrise Hours

  2024/02/13

• Resources for Business Analytics in R

  2024/01/29

• A Dual Axis Line Plot

  2024/01/22

• Line Plots with Grouping and Direct Labels

  2023/11/22

• Random Walks in Lattices

  2023/11/08

• Efficiency of Unweighted Networks

  2023/10/26

• The Small-World Property of Complex Networks

  2023/10/22

• Random and Scale-Free Network Models

  2023/09/13

• A Dummbell Plot of the Evolution of EU Gini Index

  2023/05/26

• Cleaning the Credit Card Defaults Dataset

  2023/05/15

• Three Measures of Inequality (Making Of)

  2023/05/08

• Three Measures of Inequality

  2023/04/28

• Color Blindness in R

  2023/03/31

• A Candlestick Plot of Big Stock Companies

  2023/03/22

• Plotting a Multiple Line Plot

  2023/03/15

• Plotting an Horizontal Bar Chart

  2023/03/08

• A Workflow for Exploratory Factor Analysis in R

  2023/02/27

• Prompting chatGPT to Build a Tabu Search Algorithm

  2023/02/03

• Plotting World Bank Data

  2023/01/26

• Structural Equation Modelling with lavaan

  2023/01/10

• Resources for Data Visualization

  2022/12/15

• Winners of the World Cup

  2022/12/11

• Mapping with purrr

  2022/11/30

• Recent evolution of the Spanish inflation

  2022/11/12

• Plotting complex variable functions in R

  2022/10/27

• Undersampling and oversampling with tidymodels

  2022/10/10

• Introducing the beta probability distribution

  2022/10/03

• Using undersampling with decision trees and random forests

  2022/09/23

• Introducing random forests in R

  2022/07/25

• Predicting with decision trees using rpart

  2022/07/18

• Classifying with decision trees using C5.0

  2022/07/11

• Cross validation and hyperparameter tuning with tiydmodels

  2022/07/04

• Regularized regression with glmnet

  2022/06/27

• Log transformations in numerical prediction

  2022/06/10

• Dependency networks of installed R packages

  2022/05/16

• Dense visualization in R with ggrepel and plotly

  2022/05/02

• Rolling functions in R

  2022/04/20

• A fast fitness function for the TSP in R

  2022/04/11

• Joining relational tables in dplyr

  2022/04/04

• Combinatorial explosion

  2022/02/15

• Optimizing the Odyssey

  2022/02/11

• Two airline airport networks

  2022/01/30

• Coding tabu search in R

  2022/01/24

• Coding simulated annealing in R

  2022/01/18

• Breaking symmetry in linear programming formulation

  2022/01/12

• Just another starred correlation function in R

  2022/01/03

• Examining correlation matrices in R

  2021/12/27

• Solving linear programming with GLPK in R

  2021/12/12

• Plotting US airline airport networks

  2021/11/29

• Moderated multiple regression in R

  2021/11/18

• Doing maps in R

  2021/11/07

• Covariance and Pearson correlation in R

  2021/11/01

• Intermediate solutions in QCA analysis using R

  2021/10/26

• Obtaining sufficient conditions in QCA minimizing the truth table using R

  2021/10/18

• Necessary and sufficient conditions in QCA using R

  2021/10/11

• Fuzzy sets for qualitative comparative analysis (QCA) using R

  2021/10/05

• Controlling for Type I errors for multiple hypothesis tests in R

  2021/09/23

• What is ANOVA and how to do it with R

  2021/09/14

• Categorical variables in linear regression

  2021/09/06

• Why are there vaccinated among COVID-19 infected?

  2021/08/31

• The power law

  2021/07/29

• Hierarchical linear regression

  2021/07/23

• Lissajous curves

  2021/07/16

• The viridis palettes

  2021/07/08

• The Brewer palettes

  2021/07/03

• Introducing hypothesis testing

  2021/06/25

• Logistic regression

  2021/06/19

• Pie charts versus bar charts

  2021/06/11

• Summary statistics in linear regression

  2021/06/04

• Maximum likelihood estimates

  2021/05/28

• Influential observations in linear regression

  2021/05/22

• Linear regression with broom

  2021/05/15

• A workflow for Numerical Prediction with tidymodels

  2021/05/07

• Introducing the Receiver Operating Characteristic Curve

  2021/04/30

• A workflow for Binary Classification with Tidymodels

  2021/04/22

• Merging with dtplyr

  2021/04/15

• Merging with data.table

  2021/04/09

• The all-administrative univesity

  2021/04/02

• An R nightmare of looping, growing and floating point errors

  2021/03/26

• Line and bar plots in ggplot2

  2021/03/19

• Colors and shapes of points in ggplot2

  2021/03/12

• On the performance of for loops in R

  2021/03/05

• Introducing ggplot

  2021/02/26

• Data manipulation with dplyr

  2021/02/19

• Tidy data

  2021/02/12

• Rectangular data in R

  2021/02/06

• Blogging with static websites

  2021/01/30