Paul Smith
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All (10)
accessibility (1)
code (9)
genetics (1)
graphics (3)
gwas (1)
machine learning (3)
mendelian randomisation (1)
mlr3 (3)
model fitting (3)
model validation (3)
r (9)
statistics (3)

Series

Model Building and Validation

This series contains posts related to model building and validation, including:

  • Why data-splitting is bad;
  • Issues with stepwise selection; and,
  • Optimism-adjustment via bootstrapping.

All blog posts

 

Model Validation using the Bootstrap

code
r
statistics
model fitting
model validation
This is Part Three of a four part series on model fitting and validation.
Apr 26, 2025
Paul Smith

Getting Started with {mlr3}

03 Hyperparameter Optimisation
code
r
machine learning
mlr3
I am attempting to learn how to use {mlr3} (Lang et al. 2019), by reading through the book Applied Machine Learning Using mlr3 in R (Bischl et al. 2024).
Mar 21, 2025
Paul Smith

Getting Started with {mlr3}

02 Evaluation and Benchmarking
code
r
machine learning
mlr3
I am attempting to learn how to use {mlr3} (Lang et al. 2019), by reading through the book Applied Machine Learning Using mlr3 in R (Bischl et al. 2024).
Mar 17, 2025
Paul Smith

Simulating the effect of data-splitting and stepwise selection on the lung dataset

code
r
statistics
model fitting
model validation
This is Part Two of an four part series on model fitting and validation. Part One can be found here.
Mar 15, 2025
Paul Smith
 

Some critiques of data-splitting and the stepwise procedure

code
r
statistics
model fitting
model validation
This post is partly a expansion of a comment I made about training/test sets in a previous post. It is the first part of a four part series on model fitting and validation.…
Mar 5, 2025
Paul Smith

Getting Started with {mlr3}

01 Data and Basic Modeling
code
r
machine learning
mlr3
I am attempting to learn how to use {mlr3} (Lang et al. 2019), by reading through the book Applied Machine Learning Using mlr3 in R (Bischl et al. 2024).
Mar 3, 2025
Paul Smith

A Bidirectional Bar Chart using Highcharter

code
graphics
r
This is just a quick post, as a follow on to my previous highcharter posts (one and two).
Feb 19, 2025
Paul Smith

Some Highcharter Graphs

code
graphics
r
In my previous post about {highcharter}, I considered changing some of the defaults for a scatter graph to make it look more appealing and be more accessible. This post will…
Jan 12, 2025
Paul Smith

A First Foray into Genetics, GWAS, and Mendelian Randomisation

genetics
gwas
mendelian randomisation
In the previous few weeks I have been trying to learn about Mendelian Randomisation, which has resulted in me doing a whistle-stop tour around genetics, codons, and…
Jan 11, 2025
Paul Smith

Getting Started with Accessible Highcharter

code
accessibility
graphics
r
Inspired by the quarto and me blog, I am looking into using {highcharter} (Kunst 2022). This package is a wrapper for Highcharts – an interactive charting library1.
Dec 16, 2024
Paul Smith
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Citation

BibTeX citation:
@online{untitled,
  author = {},
  url = {https://pws3141.github.io/blog/},
  langid = {en}
}
For attribution, please cite this work as:
n.d. https://pws3141.github.io/blog/.