Jan-Ole Koslik
@olemole.bsky.social
PhD student 🎓 in Statistics at Bielefeld University interested in doubly stochastic processes and their application to ecology 🦅, sports 🏈, and finance 📈.
Website: https://janoleko.github.io
GitHub: https://github.com/janoleko
Website: https://janoleko.github.io
GitHub: https://github.com/janoleko
Pinned
Our paper on #HMMs with periodically ⏰ varying transition probabilities is published! 🎉 @carlinafeldmann.bsky.social, Sina Mews, @rmichels.bsky.social @rolandlangrock.bsky.social
doi.org/10.1214/25-AOAS2107
We derive the periodically #stationary distribution and the implied dwell-time distribution
doi.org/10.1214/25-AOAS2107
We derive the periodically #stationary distribution and the implied dwell-time distribution
Our paper on #HMMs with periodically ⏰ varying transition probabilities is published! 🎉 @carlinafeldmann.bsky.social, Sina Mews, @rmichels.bsky.social @rolandlangrock.bsky.social
doi.org/10.1214/25-AOAS2107
We derive the periodically #stationary distribution and the implied dwell-time distribution
doi.org/10.1214/25-AOAS2107
We derive the periodically #stationary distribution and the implied dwell-time distribution
December 10, 2025 at 2:54 PM
Our paper on #HMMs with periodically ⏰ varying transition probabilities is published! 🎉 @carlinafeldmann.bsky.social, Sina Mews, @rmichels.bsky.social @rolandlangrock.bsky.social
doi.org/10.1214/25-AOAS2107
We derive the periodically #stationary distribution and the implied dwell-time distribution
doi.org/10.1214/25-AOAS2107
We derive the periodically #stationary distribution and the implied dwell-time distribution
Reposted by Jan-Ole Koslik
Day 2: devtools - Essential Development Workflow 🔧
The devtools package streamlines your package development workflow with key functions! ⚡
💡 Pro Tip: Use Ctrl/Cmd + Shift + L in RStudio to quickly run load_all().
📚 Resources: devtools.r-lib.org
#RPackageDev #RStats #devtools #RPackageAdvent2025
The devtools package streamlines your package development workflow with key functions! ⚡
💡 Pro Tip: Use Ctrl/Cmd + Shift + L in RStudio to quickly run load_all().
📚 Resources: devtools.r-lib.org
#RPackageDev #RStats #devtools #RPackageAdvent2025
Tools to Make Developing R Packages Easier
Collection of package development tools.
devtools.r-lib.org
December 3, 2025 at 11:01 AM
Day 2: devtools - Essential Development Workflow 🔧
The devtools package streamlines your package development workflow with key functions! ⚡
💡 Pro Tip: Use Ctrl/Cmd + Shift + L in RStudio to quickly run load_all().
📚 Resources: devtools.r-lib.org
#RPackageDev #RStats #devtools #RPackageAdvent2025
The devtools package streamlines your package development workflow with key functions! ⚡
💡 Pro Tip: Use Ctrl/Cmd + Shift + L in RStudio to quickly run load_all().
📚 Resources: devtools.r-lib.org
#RPackageDev #RStats #devtools #RPackageAdvent2025
Reposted by Jan-Ole Koslik
We have a preprint about modelling three-dimensional movement tracks, led by @njklappstein.bsky.social.
The model takes the form of a step selection function and, just like in 2D, it can include directional persistence, attraction to targets, and habitat selection.
doi.org/10.1101/2025...
The model takes the form of a step selection function and, just like in 2D, it can include directional persistence, attraction to targets, and habitat selection.
doi.org/10.1101/2025...
December 2, 2025 at 3:07 PM
We have a preprint about modelling three-dimensional movement tracks, led by @njklappstein.bsky.social.
The model takes the form of a step selection function and, just like in 2D, it can include directional persistence, attraction to targets, and habitat selection.
doi.org/10.1101/2025...
The model takes the form of a step selection function and, just like in 2D, it can include directional persistence, attraction to targets, and habitat selection.
doi.org/10.1101/2025...
Reposted by Jan-Ole Koslik
moveHMM version 1.0 turns 10 today 🎉 Such a fun 10 years; exchanging with folks who use the package (and its extensions) has been one of the best parts of my job!
October 23, 2025 at 1:18 PM
moveHMM version 1.0 turns 10 today 🎉 Such a fun 10 years; exchanging with folks who use the package (and its extensions) has been one of the best parts of my job!
Our review paper on latent Markov models is now published in Statistical Modelling! 🎉 @rolandlangrock.bsky.social @SinaMews.
We discuss choosing the right time and space formulation and provide the R package 📦 LaMa for fast ⚡and flexible estimation.
📄 Paper: journals.sagepub.com/eprint/UETXX...
We discuss choosing the right time and space formulation and provide the R package 📦 LaMa for fast ⚡and flexible estimation.
📄 Paper: journals.sagepub.com/eprint/UETXX...
sagepub.com
September 5, 2025 at 12:06 PM
Our review paper on latent Markov models is now published in Statistical Modelling! 🎉 @rolandlangrock.bsky.social @SinaMews.
We discuss choosing the right time and space formulation and provide the R package 📦 LaMa for fast ⚡and flexible estimation.
📄 Paper: journals.sagepub.com/eprint/UETXX...
We discuss choosing the right time and space formulation and provide the R package 📦 LaMa for fast ⚡and flexible estimation.
📄 Paper: journals.sagepub.com/eprint/UETXX...
My paper is out! 🎉 I explore hidden semi-Markov models with covariate-dependent state dwell-time distributions — because sometimes Markov just isn’t enough.
Case study: Arctic muskox movement! 🦬📊
🔗 www.sciencedirect.com/science/arti...
#stats #TimeSeries #HSMM #StatisticalEcology #rstats
Case study: Arctic muskox movement! 🦬📊
🔗 www.sciencedirect.com/science/arti...
#stats #TimeSeries #HSMM #StatisticalEcology #rstats
Hidden semi-Markov models with inhomogeneous state dwell-time distributions
The well-established methodology for the estimation of hidden semi-Markov models (HSMMs) as hidden Markov models (HMMs) with extended state spaces is …
www.sciencedirect.com
March 19, 2025 at 4:35 PM
My paper is out! 🎉 I explore hidden semi-Markov models with covariate-dependent state dwell-time distributions — because sometimes Markov just isn’t enough.
Case study: Arctic muskox movement! 🦬📊
🔗 www.sciencedirect.com/science/arti...
#stats #TimeSeries #HSMM #StatisticalEcology #rstats
Case study: Arctic muskox movement! 🦬📊
🔗 www.sciencedirect.com/science/arti...
#stats #TimeSeries #HSMM #StatisticalEcology #rstats
Reposted by Jan-Ole Koslik
Rdatasets is a collection of 2300 free and documented datasets in CSV format. It's a great resource for teaching and exploration!
The new `get_dataset()` function from the {marginaleffects} 📦 allows you to search and load them directly in #Rstats.
vincentarelbundock.github.io/Rdatasets/ar...
The new `get_dataset()` function from the {marginaleffects} 📦 allows you to search and load them directly in #Rstats.
vincentarelbundock.github.io/Rdatasets/ar...
February 14, 2025 at 12:54 PM
Rdatasets is a collection of 2300 free and documented datasets in CSV format. It's a great resource for teaching and exploration!
The new `get_dataset()` function from the {marginaleffects} 📦 allows you to search and load them directly in #Rstats.
vincentarelbundock.github.io/Rdatasets/ar...
The new `get_dataset()` function from the {marginaleffects} 📦 allows you to search and load them directly in #Rstats.
vincentarelbundock.github.io/Rdatasets/ar...
Reposted by Jan-Ole Koslik
happy first birthday to Bluesky, and what a year it's been!
with every day, the need for an open network that puts people first becomes increasingly clear. we're glad to be building this with you. after all, the heart of a social network is the people.
with every day, the need for an open network that puts people first becomes increasingly clear. we're glad to be building this with you. after all, the heart of a social network is the people.
February 6, 2025 at 5:49 PM
happy first birthday to Bluesky, and what a year it's been!
with every day, the need for an open network that puts people first becomes increasingly clear. we're glad to be building this with you. after all, the heart of a social network is the people.
with every day, the need for an open network that puts people first becomes increasingly clear. we're glad to be building this with you. after all, the heart of a social network is the people.
Reposted by Jan-Ole Koslik
The world is on 🔥 -- and here's my first publication in an astronomy journal: iopscience.iop.org/article/10.3...
We combine Gaussian processes + hidden Markov models to efficiently detect stellar flares in one modelling step. 🧪
We combine Gaussian processes + hidden Markov models to efficiently detect stellar flares in one modelling step. 🧪
January 31, 2025 at 2:26 AM
The world is on 🔥 -- and here's my first publication in an astronomy journal: iopscience.iop.org/article/10.3...
We combine Gaussian processes + hidden Markov models to efficiently detect stellar flares in one modelling step. 🧪
We combine Gaussian processes + hidden Markov models to efficiently detect stellar flares in one modelling step. 🧪
Reposted by Jan-Ole Koslik
Could watch this animation all day 😍
Did you know that you can create GIFs with gganimate()? They can even be embedded in a latex PDF file and played via Adobe Acorbat Reader 💥
#ggplot #gganimate #datavisualisation #statisticalmodelling #finance #economics #quants
Did you know that you can create GIFs with gganimate()? They can even be embedded in a latex PDF file and played via Adobe Acorbat Reader 💥
#ggplot #gganimate #datavisualisation #statisticalmodelling #finance #economics #quants
January 21, 2025 at 1:57 PM
Could watch this animation all day 😍
Did you know that you can create GIFs with gganimate()? They can even be embedded in a latex PDF file and played via Adobe Acorbat Reader 💥
#ggplot #gganimate #datavisualisation #statisticalmodelling #finance #economics #quants
Did you know that you can create GIFs with gganimate()? They can even be embedded in a latex PDF file and played via Adobe Acorbat Reader 💥
#ggplot #gganimate #datavisualisation #statisticalmodelling #finance #economics #quants
Reposted by Jan-Ole Koslik
2024 @copernicusecmwf.bsky.social #climate data out today:
📈 2024 - first year more than 1.5°C above pre-industrial; for ERA5 it was 1.6ºC
🌡️ the past 10 years were the 10 warmest years on record
📈 2024 was warmest year for all continental regions, except Antarctica and Australasia
🌍🌡️🧪⚒️🌊
📈 2024 - first year more than 1.5°C above pre-industrial; for ERA5 it was 1.6ºC
🌡️ the past 10 years were the 10 warmest years on record
📈 2024 was warmest year for all continental regions, except Antarctica and Australasia
🌍🌡️🧪⚒️🌊
January 10, 2025 at 6:20 AM
2024 @copernicusecmwf.bsky.social #climate data out today:
📈 2024 - first year more than 1.5°C above pre-industrial; for ERA5 it was 1.6ºC
🌡️ the past 10 years were the 10 warmest years on record
📈 2024 was warmest year for all continental regions, except Antarctica and Australasia
🌍🌡️🧪⚒️🌊
📈 2024 - first year more than 1.5°C above pre-industrial; for ERA5 it was 1.6ºC
🌡️ the past 10 years were the 10 warmest years on record
📈 2024 was warmest year for all continental regions, except Antarctica and Australasia
🌍🌡️🧪⚒️🌊
Reposted by Jan-Ole Koslik
Quite a nice watch:
youtu.be/TE4R8bumI-Q?...
youtu.be/TE4R8bumI-Q?...
On Theoretical Foundations of Diffusion Models
YouTube video by C3 Digital Transformation Institute
youtu.be
January 6, 2025 at 9:01 PM
Quite a nice watch:
youtu.be/TE4R8bumI-Q?...
youtu.be/TE4R8bumI-Q?...
In this year‘s NFL Big Data Bowl 🏈 submission, @rmichels.bsky.social, Robert Bajons, and I employ hidden Markov models to uncover 🔎guarding assignments and use this additional information to improve the prediction of defensive strategies. 📊
#bigdatabowl #rstats
#bigdatabowl #rstats
January 7, 2025 at 2:10 PM
In this year‘s NFL Big Data Bowl 🏈 submission, @rmichels.bsky.social, Robert Bajons, and I employ hidden Markov models to uncover 🔎guarding assignments and use this additional information to improve the prediction of defensive strategies. 📊
#bigdatabowl #rstats
#bigdatabowl #rstats
Reposted by Jan-Ole Koslik
Big Data Bowl submissions are due tomorrow
🚨🚨
The deadline is 11:59 PM UTC, which is 6:59 PM EST
🚨🚨
#BigDataBowl
🚨🚨
The deadline is 11:59 PM UTC, which is 6:59 PM EST
🚨🚨
#BigDataBowl
January 6, 2025 at 2:39 AM
Big Data Bowl submissions are due tomorrow
🚨🚨
The deadline is 11:59 PM UTC, which is 6:59 PM EST
🚨🚨
#BigDataBowl
🚨🚨
The deadline is 11:59 PM UTC, which is 6:59 PM EST
🚨🚨
#BigDataBowl
Reposted by Jan-Ole Koslik
The {matrixStats} #RStats 📦 “provides highly optimized functions for computing common summaries over rows and columns of matrices, e.g. rowQuantiles(). There are also functions that operate on vectors.”
By @henrikbengtsson.bsky.social
github.com/HenrikBengts...
By @henrikbengtsson.bsky.social
github.com/HenrikBengts...
![Example
With a matrix
> x <- matrix(rnorm(20 * 500), nrow = 20, ncol = 500)
it is many times faster to calculate medians column by column using
> mu <- matrixStats::colMedians(x)
than using
> mu <- apply(x, MARGIN = 2, FUN = median)
Moreover, if performing calculations on a subset of rows and/or columns, using
> mu <- colMedians(x, rows = 33:158, cols = 1001:3000)
is much faster and more memory efficient than
> mu <- apply(x[33:158, 1001:3000], MARGIN = 2, FUN = median)](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:z4cp3uwgxiioi7uaxn2boq47/bafkreia5r4zydpx435mcoo4gbd2halv3uhaqw4pywcpwkwtrjla4tyjvoq@jpeg)
January 3, 2025 at 12:43 PM
The {matrixStats} #RStats 📦 “provides highly optimized functions for computing common summaries over rows and columns of matrices, e.g. rowQuantiles(). There are also functions that operate on vectors.”
By @henrikbengtsson.bsky.social
github.com/HenrikBengts...
By @henrikbengtsson.bsky.social
github.com/HenrikBengts...
I crunch a lot of numbers to ultimately tell people „yeah this thing may or may not happen idk“.
December 30, 2024 at 10:25 PM
I crunch a lot of numbers to ultimately tell people „yeah this thing may or may not happen idk“.
Reposted by Jan-Ole Koslik
What a year! Bluesky opened its doors just last February. Since then, we opened federation, launched video, rolled out trending topics, and a whole lot more.
Happy New Year, and here’s to a great year ahead! 🎉
Happy New Year, and here’s to a great year ahead! 🎉
2024 In Review - Bluesky
It’s been a big year for Bluesky! Let's take a look back at everything that’s happened in the past year.
bsky.social
December 30, 2024 at 7:09 PM
What a year! Bluesky opened its doors just last February. Since then, we opened federation, launched video, rolled out trending topics, and a whole lot more.
Happy New Year, and here’s to a great year ahead! 🎉
Happy New Year, and here’s to a great year ahead! 🎉
December 30, 2024 at 2:10 PM
Reposted by Jan-Ole Koslik
Reposted by Jan-Ole Koslik
Reposted by Jan-Ole Koslik
Sina Mews, Roland Langrock, and I have updated 🆕 our review paper!
It offers a comprehensive overview on choosing the right time ⏰ and space 📏 formulation for latent Markov models, providing a unifying perspective on discrete- and continuous-time HMMs, SSMs and MMPPs.
👉 arxiv.org/abs/2406.19157
It offers a comprehensive overview on choosing the right time ⏰ and space 📏 formulation for latent Markov models, providing a unifying perspective on discrete- and continuous-time HMMs, SSMs and MMPPs.
👉 arxiv.org/abs/2406.19157
How to build your latent Markov model -- the role of time and space
Statistical models that involve latent Markovian state processes have become immensely popular tools for analysing time series and other sequential data. However, the plethora of model formulations, t...
arxiv.org
December 25, 2024 at 4:30 PM
Sina Mews, Roland Langrock, and I have updated 🆕 our review paper!
It offers a comprehensive overview on choosing the right time ⏰ and space 📏 formulation for latent Markov models, providing a unifying perspective on discrete- and continuous-time HMMs, SSMs and MMPPs.
👉 arxiv.org/abs/2406.19157
It offers a comprehensive overview on choosing the right time ⏰ and space 📏 formulation for latent Markov models, providing a unifying perspective on discrete- and continuous-time HMMs, SSMs and MMPPs.
👉 arxiv.org/abs/2406.19157