Articles by Gary Hutson

Advanced Modelling in R with CARET – a focus on supervised machine learning

June 18, 2020 | 0 Comments

Yesterday (17th June) I did a session with the NHS-R Community relating to how to use the brilliant CARET package to build, evaluate, train and improve machine learning models. This was an entry level webinar to highlight the possibilities of how supervised machine learning could be used in the NHS ... [Read more...]

Threading and Caret: Burning your CPU to improve model training speed

May 6, 2020 | 0 Comments

When I am doing a Machine Learning project with R it is crucial to save those precious seconds, minutes, hours in model training. To make sure you optimise your CPU and crank up the performance you will need to load in the parallel and doParallel libraries, alongside library(caret). A ...

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OddsPlotty – the first official package I have ‘officially’ launched

November 7, 2019 | 0 Comments

Motivation for this The background to this package linked to a project I undertook about a year ago. The video relates to the project and the how R really sped up the process. The exam question was to use a regression model to predict admissions and we had to evaluate, ...

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Command Centre amplification with predictive analytics and machine learning

November 1, 2019 | 0 Comments

Recently, our team at Draper and Dash have been busy creating an NHS operational command centre. This command centre is different, as it uses a collection and ensemble of cutting edge predictive and machine learning techniques. To read the blog you can access this below: We have really enjoyed the ... [Read more...]

Getting on the meet-up bandwagon – our first meet up event

September 12, 2019 | 0 Comments

My company Draper and Dash have tasked me with organising a wider meet-up event for anyone who is interested in AI / ML in healthcare. This wider working group consists of people from different sectors, however they are interested in how we can apply AI / ML methods in their organisations. Why ...

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Predictive Solutions Series – Draper & Dash’s Stranded and Super Stranded Patient Module

September 6, 2019 | 0 Comments

Lots of exciting things are happening with Draper and Dash at the moment. We have been working with key healthcare partners to design some core predictive machine learning algorithms to enable trusts to more effectively manage their performance, demand and capacity pressures. This series focuses on Stranded Patients and Super ...

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Bucketing and highlighting dominant predictors in your ML models

September 5, 2019 | 0 Comments

Our company have been at it again. This time from my colleagues and fellow Data Scientist Alfonso Portabales. For this post we look at Draper and Dash’s custom method of highlighting dominant predictors in your machine learning models: If you are interested in our solutions in healthcare then please ... [Read more...]

Deploying a ML model in R

August 9, 2019 | 0 Comments

As a product of a series of training sessions Draper & Dash have been undertaking on Machine Learning using R – a candidate from the course asked “how do you split a model to later be used in a live / production environment?”. This post aims to answer that question: I hope you ... [Read more...]

Confusion matrices – evaluating your classification models

August 8, 2019 | 0 Comments

As part of my companies commitment to allow our users access to some of our code – we have created a visual way you can assess your accuracy in a confusion matrix. The below was posted on our blog site and shows how to interpret a confusion matrix. I hope the ... [Read more...]

Machine Learning Training – Draper and Dash Healthcare Predictive Analytics – Summer Discount

August 2, 2019 | 0 Comments

There is an offer on with my company Draper & Dash to get a discount on ML training for your organisation. Contact the sales team to find out more about this training opportunity. Plus you get to meet our great data science team at Draper and Dash. The below is me ... [Read more...]

RODBC helper function

May 31, 2019 | 0 Comments

The number of times I have to connect to SQL and I forget part of the RODBC command to connect to an internal data table. As part of a project I am working on I have been connecting to lots of different sources and became tired of typing lots of ... [Read more...]

Outpatient scatter charts: Analysing new and follow up activity with gganimate

January 30, 2019 | 0 Comments

I was inspired by my friend John Mackintosh to have a muck around with the fabulous gganimate. I have to say…. I am in love. I can remember coding this into Excel VBA, to get my animations to work on my data, and now R has the potential. John will ... [Read more...]

NHS-R Community: Up the R-evolution

January 29, 2019 | 0 Comments

It seems like two seconds ago since I was frantically preparing slides for the first NHS community. Wow – what an experience and kudos to the team @NHS-R Community for arranging it. The full content of the event has been posted: https://nhsrcommunity.com/nhs-r-conference-9-october-2018/. What a fantastic event this ... [Read more...]

A simple function to create nice correlation plots

November 30, 2018 | 0 Comments

The problem I was working with a dataset where I wanted to assess the correlation of different variables in R. As much as I like R – the outputs from the console window leave something to be desired (in terms of data visualisation). Therefore, I wanted a way to visualise these ... [Read more...]

A simple function to install and load packages in R

August 16, 2018 | 0 Comments

One function to rule the world, or install or load your packages for you I was starting to despair at the amount of packages I end up using during the task of transforming, cleaning, modelling and validating some of my models. I thought there must be a simple approach to ... [Read more...]

DPLYR: A Beginners Guide

May 24, 2018 | 0 Comments

What is DPLYR? Dplyr is a grammar of data manipulation, providing a consistent set of verbs that help you solve the most common data manipulation challenges. The next series of examples will show how you can use the shortcuts in Dplyr to achieve the results of traditional R data manipulation, ...

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Violin and density plots in ggplot2

May 17, 2018 | 0 Comments

Violin Plots This chart is a combination of a Box Plot and a Density Plo that is rotated and placed on each side, to show the distribution shape of the data. The thick black bar in the centre represents the interquartile range, the thin black line extended from it represents ...

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Box Plots in ggplot2

May 16, 2018 | 0 Comments

Setting up the plot The box plot, in ggplot2, can be really powerful and useful for analysing variation. I will show a few examples of different types of box plots in ggplot2. Basic Box Plot library(ggplot2) theme_set(theme_classic()) # Plot plot [Read more...]

Histogram with auto binning in ggplot2

May 16, 2018 | 0 Comments

Histograms (with auto binning) Again, we will use the mtcars dataset and use the fields in that to produce the chart, as we are doing this there is nothing to do on the data preparation side. That leaves us to have fun with the plot. Building the Histogram with auto ... [Read more...]

Diverging Dot Plot and Lollipop Charts – Plotting Variance with ggplot2

May 16, 2018 | 0 Comments

Creating the Dot Plot Variance chart The data preparation was used in the previous blog entitled: Diverging Bar Charts – Plotting Variance with ggplot2. Refer to that if you need to know how to create the data prior to this tutorial. Setting up the Dot Plot Variance chart library(ggplot2) ggplot(... [Read more...]

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Articles by Gary Hutson

Advanced Modelling in R with CARET – a focus on supervised machine learning

Threading and Caret: Burning your CPU to improve model training speed

OddsPlotty – the first official package I have ‘officially’ launched

Command Centre amplification with predictive analytics and machine learning

Getting on the meet-up bandwagon – our first meet up event

Predictive Solutions Series – Draper & Dash’s Stranded and Super Stranded Patient Module

Bucketing and highlighting dominant predictors in your ML models

Deploying a ML model in R

Confusion matrices – evaluating your classification models

Machine Learning Training – Draper and Dash Healthcare Predictive Analytics – Summer Discount

RODBC helper function

Outpatient scatter charts: Analysing new and follow up activity with gganimate

NHS-R Community: Up the R-evolution

A simple function to create nice correlation plots

A simple function to install and load packages in R

DPLYR: A Beginners Guide

Violin and density plots in ggplot2

Box Plots in ggplot2

Histogram with auto binning in ggplot2

Diverging Dot Plot and Lollipop Charts – Plotting Variance with ggplot2

Articles by Gary Hutson

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