GGIR release 3.3-6
The GGIR 3.3-6 release is now on CRAN. In this blog post I will talk you through the main updates since the 3.3-0 CRAN release from September 2025. For a full overview see the GGIR changelog, where # numbers re…
THE ACCELTING NOTEBOOK · 2020–2026
Notes, ideas
& discoveries.
Writing by Vincent van Hees on accelerometry, movement, sleep, and the development of GGIR.
These posts are preserved as originally published. References to Accelting services reflect the time they were written; professional enquiries now go through SE4BIO.
28 posts
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GGIR release 3.3-0
The GGIR 3.3-0 release is now on CRAN. In this blog post I will talk you through the main updates since the 3.2-6 CRAN release from April 2025. For a full overview see the GGIR changelog, where # numbers refer …
GGIR release 3.2-6
The GGIR 3.2-6 release is now on CRAN. In this blog post I will talk you through the main updates since the 3.2-0 CRAN release from February 2025. For a full overview see the GGIR changelog, where # numbers ref…
GGIR release 3.2-0
The GGIR 3.2-0 release is now on CRAN. In this blog post I will talk you through the main updates since the 3.1-5 CRAN release from November 2024. For full overview see the GGIR changelog, where # numbers refer…
Combined analysis of accelerometer and gps data
I am delighted to inform you about a set of software tools I have been working on for the HABITUS project led by Jasper Schipperijn. I already mentioned this project in a blog post from 2020, so I think it is t…
GGIR release 3.1-5
The GGIR 3.1-5 release is now on CRAN. In this blog post I will talk you through the main updates since the 3.1-0 CRAN release from May 2024. For full overview see the GGIR changelog, where # numbers refer to s…
Comparability of raw data from different accelerometer brands and configurations
A new article was recently published from the project I did with Annelinde Lettink and colleagues at Amsterdam University Medical Center. The gap in knowledge we aim to fill For many years the field has focusse…
GGIR release 3.1-0
In this blog post we will talk you through the main updates in the GGIR 3.1-0 release. For a full list of updates since the 3.0-0 CRAN release, see the GGIR changelog. Major review and tidy up of GGIR part 1 co…
GGIR release 3.0-0
In this blog post we will talk you through the main updates in the GGIR 3.0-0 release. For a full list of updates since the 2.9-0 CRAN release, see the GGIR changelog. New version of non-wear detection GGIR’s n…
10th Anniversary of GGIR!
Today marks the 10th anniversary of GGIR as R package on CRAN. A lot of time and effort has gone into GGIR over the years, and it is still being used! Therefore, this is a moment to celebrate and to reflect on …
GGIR adopts Apache 2.0 licence
Since its inception in 2012/2013, R package GGIR has been available with an LGPL software license. The LGPL license has allowed for re-use of GGIR as a software library in both commercial and academic settings.…
GGIR release 2.9-0
In this blog post we will talk you through the main updates in the new GGIR 2.9-0 release. For a full list of updates since the previous CRAN release (version 2.8-2), see the [GGIR changelog]( https://cran.r-pr…
A short R tutorial
GGIR for those without prior R experience R package GGIR has been designed with the ambition to be user-friendly without prior R experience. For example, usage of GGIR entails only a single function call that t…
GGIR release 2.8-0
In this blog post I will talk you through the main updates in the new GGIR 2.8-0 release. For a full list of updates since the previous CRAN release (version 2.7-1), see the GGIR changelog. Time gap handling in…
Why does GGIR facilitate the cut-points approach?
The ‘cut-points’ approach is one of the most criticized analytical approaches in the field of physical activity research. Despite the criticism, cut-points are still widely used. R package GGIR facilitates the …
GGIR release 2.7-1
In this blog post I will talk you through the main updates in the new GGIR 2.7-1 release. For a full list of updates since the previous CRAN release (version 2.6-0), see the GGIR changelog. File handling Functi…
How to keep GGIR alive?
If we want Open-Source research software to remain functional and relevant then an ongoing maintenance effort is needed. At a basic level, the maintenance effort would include the preservation of functionality.…
GGIR release 2.6-0
In this blog post I will talk you through the main updates in the new GGIR 2.6-0 release. For a full list of updates since the previous CRAN release (version 2.5-0), see the GGIR changelog. GGIR now able to rea…
GGIR release 2.5-0
In this blog post I will talk you through the main updates to the new GGIR 2.5-0 release. For a full list of updates since the previous CRAN release (version 2.4-0), see the GGIR changelog. (NEW) Tutorial on se…
Federated Data Analysis in ProPASS
The aim of this project is to help implement Federated Data Analysis in ProPASS. ProPASS is the international research consortium for Prospective Physical Activity, Sitting and Sleep. The consortium aims to fac…
Classifying behaviour in Covid-19 patients
Chronic fatigue is a condition where patients perceive extreme fatigue for long periods of time. Mental activity or physical activity worsen the fatigue, while paradoxically taking rest is not always a solution…
How to measure PA guideline adherence?
I often get asked the question: How can we quantify a person’s adherence to the physical activity (PA) guidelines with an accelerometer? In this blog post I will try to answer that question. How we arrived here…
High frequencies in an acceleration signal
It is often argued that high frequency components in an acceleration signal should be omitted. The motivation given is that these high frequencies are a consequence of machine noise or vibrations, or at least n…
HABITUS
Merging and processing accelerometer and GPS data HABITUS is a system for merging and processing accelerometer and GPS data hosted by the University of Southern Denmark, and the successor to the PALMS system wh…
Sleepsight analytics pipeline
Sleepsight People living with psychosis often experience problems with their sleep, particularly when symptoms worsen. Sleepsight is an innovative research study taking place in South London which uses wearable…
Physical Activity descriptors for Cardiometabolic Health
Earlier this year I started a new project with Dr. Séverine Sabia at the French National Institute for Health Research (INSERM). I have successfully collaborated with Dr. Sabia in the past. Our new project expl…
Data Quality in German National Health Cohort
Accelerometer data in NAKO The German National Health Cohort (NAKO) has collected high resolution accelerometer data in a large sample of the German population. After visiting the study centre, the study partic…
Accelting: New name, logo, and website
Getting started When I started my independent consultancy work in early 2018 I did it for no more than 1 day per week. So, it did not seem necessary to actively invest in my branding with a fancy website or log…
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