Dan Oehm | Gradient Descending

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Survivor Confessionals Data: Dataset showcase for {survivoR}

July 30, 2022No Comments
Dot chart with two different gradients

How to use multiple colour scales in ggplot with {ggnewscale}

June 13, 2022No Comments
Infographic of the history of advantages in Survivor

Survivor Advantages: Dataset showcase for {survivoR}

June 10, 2022No Comments

Survivor Do or Die: Should you sit out or fight for immunity?

May 15, 2022No Comments
Data Science R

Probability of Selecting Matched Pairs and the Hypergeometric Distribution

August 8, 2018 Daniel Oehm 0 Comments

The problem Consider a case where we have a bag of marbles of size . The bag consists of black […]

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Data Science R

PCA vs Autoencoders for Dimensionality Reduction

July 28, 2018 Daniel Oehm 0 Comments

There are a few ways to reduce the dimensions of large data sets to ensure computational efficiency such as backwards […]

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Data Science R

Confidentialise Your Data with the randomNames Package

July 23, 2018 Daniel Oehm 0 Comments

Sensitive data has it’s restrictions for good reason. Personal data such as names and other identifiable information should be protected. […]

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Data Science

Improve Your Training Set with Unsupervised Learning

July 14, 2018 Daniel Oehm 0 Comments

On my previous post Advanced Survey Design and Application to Big Data I mentioned unsupervised learning can be used to […]

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Data Science R

Advanced Survey Design and Application to Big Data

July 11, 2018 Daniel Oehm 2 Comments

I like to describe Official statistics as the All Bran of statistics, it’s bland and a bit boring but it […]

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Data Science R

Deep Neural Network from Scratch in R

June 15, 2018 Daniel Oehm 0 Comments

Neural networks evolved in the computer science domain are often the first thing people think of when they hear machine […]

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Data Science R

Unsupervised Random Forest Example

June 8, 2018 Daniel Oehm 2 Comments

A need for unsupervised learning or clustering procedures crop up regularly for problems such as customer behavior segmentation, clustering of […]

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Data Science R

Design Matrix for Regression Explained

June 7, 2018 Daniel Oehm 1 Comment

Recently I was asked about the design matrix (or model matrix) for a regression model and why it is important. […]

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Data Science R

Introduction to Outlier Detection

June 5, 2018 Daniel Oehm 0 Comments

Outlier detection and treatment is an important part of data analysis and one of the first things you should do […]

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Ultrarunning

UTA100 2018: Race report

June 5, 2018 Daniel Oehm 0 Comments

This was my first UTA100. A race I’ve long wanted to do. It’s an amazing event, the atmosphere is exhilarating […]

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Data Science

Agile Methodology for Data Science Projects

June 1, 2018 Daniel Oehm 0 Comments

Agile project management methodology is a powerful framework when businesses are faced with uncertainty, rigid time frames and budget constraints. […]

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Data Science

Singular Value Decomposition: Image Compression

May 12, 2018 Daniel Oehm 0 Comments

Singular value decomposition (SVD) is a matrix factorisation technique. It is a method to factorise any given matrix into 3 […]

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Data Science R

What is the Bayes Factor anyway?

May 10, 2018 Daniel Oehm 0 Comments

The Bayes Factor is a quantitative measure of much evidence there is for hypothesis A relative to hypothesis B given […]

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Data Science R

Forecasting Air Pollution Levels with State Space Models

May 8, 2018 Daniel Oehm 0 Comments

Recently I was looking at a Kaggle dataset on air quality and the relationships between the concentrations of contaminants and […]

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Data Science R

State Space Models for Time Series Analysis and the dlm package

May 8, 2018 Daniel Oehm 0 Comments

State space modelling is a popular technique for forecasting and smoothing time series data. There are two main components which […]

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Recent Posts
  • Survivor Confessionals Data: Dataset showcase for {survivoR}
  • How to use multiple colour scales in ggplot with {ggnewscale}
  • Survivor Advantages: Dataset showcase for {survivoR}
  • Survivor Do or Die: Should you sit out or fight for immunity?
  • survivoR v1.0 is now on CRAN
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