Groups keyboard shortcuts have been updated

Dismiss

See shortcuts

ctmm R user group

Contact owners and managers

1–30 of 586

Welcome! This group is for questions and discussions about the ctmm: continuous-time movement modeling package for R, and topics related to the movement models and statistical methods implemented in ctmm. Here are some useful links:

ctmm FAQ: ?"ctmm-FAQ" or help("ctmm-FAQ")
ctmm package news: news(package="ctmm")
Github organization : project
Master-branch development packages can be installed from the command line: remotes::install_github("ctmm-initiative/ctmm")
Calabrese, J. M., C. H. Fleming and E. Gurarie (2016), "ctmm: an R package for analyzing animal relocation data as a continuous-time stochastic process", Methods in Ecology and Evolution, 7:9 1124–1132 (2016).
Calabrese, J. M., C. H. Fleming, M. J. Noonan, X. Dong, "ctmmweb: A Graphical User Interface for Autocorrelation‐Informed Home Range Estimation", Wildlife Society Bulletin, doi:10.1002/wsb.1154 (2021).
AniMove ctmm lectures (2022)
ctmm workshop materials: ctmmlearn

If you have encountered some errors or misbehavior with your data and want to keep them private, then feel free to message or email the data to me separately and post your inquiry here.

Below are links to project code that use ctmm:

Space Use and Movement Patterns of Moose in Southwest Alaska

0 selected

Christen Fleming

2/8/19

raster 3.0-7 Newer versions of raster have broken something in projection() and projection()<-. I

unread,

raster 3.0-7 Newer versions of raster have broken something in projection() and projection()<-. I

2/8/19

May 15

Help with ctmm fractal fits and speed() errors on deer telemetry (camera trap data)

Subject: Help with ctmm fractal fits and speed() errors on deer telemetry Dear Chris, I hope you'

unread,

Help with ctmm fractal fits and speed() errors on deer telemetry (camera trap data)

Subject: Help with ctmm fractal fits and speed() errors on deer telemetry Dear Chris, I hope you'

May 15

Giulia Scartezzini

May 8

AKDE and Overlap estimation

Hello everyone! I am Giulia PhD student that works on RSF with GPS data from Wolves. I have some

unread,

AKDE and Overlap estimation

Hello everyone! I am Giulia PhD student that works on RSF with GPS data from Wolves. I have some

May 8

Anna Ciezarek, Christen Fleming2

May 6

Problems with rsf.fit and spatRasters

Hi Anna, I haven't yet updated the package from raster to terra. You still need to use raster

unread,

Problems with rsf.fit and spatRasters

Hi Anna, I haven't yet updated the package from raster to terra. You still need to use raster

May 6

May 6

AKDE for a central place foraging seabird species

Hi Chris, hi everybody, I want to get population-level autocorrelated kernel density home-range

unread,

AKDE for a central place foraging seabird species

Hi Chris, hi everybody, I want to get population-level autocorrelated kernel density home-range

May 6

Ryan Bourbour, Christen Fleming2

May 5

Troubleshooting RSF results

Hi Ryan, In more recent versions of the package, I disabled feature selection on such parameters in

unread,

Troubleshooting RSF results

Hi Ryan, In more recent versions of the package, I disabled feature selection on such parameters in

May 5

May 1

Understanding Variogram Output

Hello, I'm trying to understand how best to approximate the home range for a tagged individual,

unread,

Understanding Variogram Output

Hello, I'm trying to understand how best to approximate the home range for a tagged individual,

May 1

Lorenzo Frangini2

Apr 30

Mean occurrence

Sorry, the code is not easy to read. Here a better visualization bears<-as.telemetry(bears) #

unread,

Mean occurrence

Sorry, the code is not easy to read. Here a better visualization bears<-as.telemetry(bears) #

Apr 30

Amelia J, Christen Fleming2

Apr 30

AKDE() processing time under different CRS

Hi Amelia, Sorry for the delayed response. https://epsg.io/3577 says that EPSG:3577 is in the GRS

unread,

AKDE() processing time under different CRS

Hi Amelia, Sorry for the delayed response. https://epsg.io/3577 says that EPSG:3577 is in the GRS

Apr 30

Mackenzie Jones2

Apr 25

Utilization Distributions

For more information, this is the error message that is occurring: Warning messages: 1: In cov.

unread,

Utilization Distributions

For more information, this is the error message that is occurring: Warning messages: 1: In cov.

Apr 25

Zehidul Hussain, Cleo Ferreira2

Apr 25

Issue with Projection and Plot

Hi Zehudil, I'm not sure if you've solved this yet, but I had the same problem. What worked

unread,

Issue with Projection and Plot

Hi Zehudil, I'm not sure if you've solved this yet, but I had the same problem. What worked

Apr 25

Abigail Lenzini

Apr 18

Mean AKDES and PKDES

Hello, My team has been using CTMM web to complete the individual AKDEs to estimate home ranges, but

unread,

Mean AKDES and PKDES

Hello, My team has been using CTMM web to complete the individual AKDEs to estimate home ranges, but

Apr 18

Noah Osterhoudt, … yu lei8

Apr 14

Segmenting data and Segclust2d

Hi Kerry I have a similar question as Noah. I guess that adding variables like step length or net

unread,

Segmenting data and Segclust2d

Hi Kerry I have a similar question as Noah. I guess that adding variables like step length or net

Apr 14

Jonah Rothleder

Apr 14

Pseudoreplication in population RSF analysis

Hello Group, I am currently in the process of formalizing the methods I am going to use for a

unread,

Pseudoreplication in population RSF analysis

Hello Group, I am currently in the process of formalizing the methods I am going to use for a

Apr 14

Apr 11

rsf.fit output interpretation

Apologies for the formatting issue. Here's the corrected output: Em sexta-feira, 11 de abril de

unread,

rsf.fit output interpretation

Apologies for the formatting issue. Here's the corrected output: Em sexta-feira, 11 de abril de

Apr 11

Apr 11

Regression weighting based on the DOF of speed estimates

Hi everyone, I have a bit of a niche question that will hopefully be an easy one to answer. I'm

unread,

Regression weighting based on the DOF of speed estimates

Hi everyone, I have a bit of a niche question that will hopefully be an easy one to answer. I'm

Apr 11

James S, Christen Fleming3

Mar 31

Very low overlap values instead of zero

Hi Chris, I figured something like that was the case but I thought I should double check. Thanks very

unread,

Very low overlap values instead of zero

Hi Chris, I figured something like that was the case but I thought I should double check. Thanks very

Mar 31

Amelia J, Christen Fleming4

Mar 21

Understanding oscillations in variogram

Thanks Chris! I'll take a closer look at the model selection aspect of the periodograms :) I have

unread,

Understanding oscillations in variogram

Thanks Chris! I'll take a closer look at the model selection aspect of the periodograms :) I have

Mar 21

Christen Fleming

Mar 18

Week-long ctmm workshop in Corvallis, Oregon

The Oregon chapter of The Wildlife Society will be hosting a week-long ctmm workshop at Oregon State

unread,

Week-long ctmm workshop in Corvallis, Oregon

The Oregon chapter of The Wildlife Society will be hosting a week-long ctmm workshop at Oregon State

Mar 18

Issy Perry, Christen Fleming3

Mar 15

Issue with rsf.select() Dropping Some Values but not Others

Hi Issy, The function of rsf.select() is to use AIC/BIC to select covariates and not necessarily

unread,

Issue with rsf.select() Dropping Some Values but not Others

Hi Issy, The function of rsf.select() is to use AIC/BIC to select covariates and not necessarily

Mar 15

Jared Zev Kannel, Christen Fleming4

Mar 12

Unexplained Rotation in the Graph of a Home Range?

Hi Jared, Subsetting before as.telemetry() gave different automated projections. You can just do

unread,

Unexplained Rotation in the Graph of a Home Range?

Hi Jared, Subsetting before as.telemetry() gave different automated projections. You can just do

Mar 12

Theo O'Malley, Christen Fleming3

Mar 7

AKDE mapping and habitat overlap

Hi Theo, You should be able to export the AKDE areas into sp or sf formats and then calculate that

unread,

AKDE mapping and habitat overlap

Hi Theo, You should be able to export the AKDE areas into sp or sf formats and then calculate that

Mar 7

Chris MacColl, Christen Fleming3

Mar 5

CRS issue with RSFs

Hi Chris, as.telemetry() works from the long-lat data regardless of any projection you might do

unread,

CRS issue with RSFs

Hi Chris, as.telemetry() works from the long-lat data regardless of any projection you might do

Mar 5

Kerry Kilshaw, … Christen Fleming12

Mar 5

trouble with writevector

Hi All, If I could reproduce the error, then I would definitely fix it. To anyone getting the error,

unread,

trouble with writevector

Hi All, If I could reproduce the error, then I would definitely fix it. To anyone getting the error,

Mar 5

Kamran Husain, Jesse Alston3

Feb 23

Applying the Continuous-Time Movement Model (CTMM) to a dataset with non-uniform GPS fixes

Thank you Jesse, for explaining this! Kamran On Sunday, 23 February 2025 at 07:40:15 UTC+5:30 Jesse

unread,

Applying the Continuous-Time Movement Model (CTMM) to a dataset with non-uniform GPS fixes

Thank you Jesse, for explaining this! Kamran On Sunday, 23 February 2025 at 07:40:15 UTC+5:30 Jesse

Feb 23

Tyler Hodges, Christen Fleming11

Feb 15

cluster() Function and Paper

Good evening, Chris, Thanks for the response! In this case, the 2nd-order selection that I am

unread,

cluster() Function and Paper

Good evening, Chris, Thanks for the response! In this case, the 2nd-order selection that I am

Feb 15

Storm Crews, Christen Fleming3

Feb 12

Single projection for multitude of individuals (large area)

Thank you kindly, Chris! Your response is very much appreciated. Best, Storm Crews On Tuesday,

unread,

Single projection for multitude of individuals (large area)

Thank you kindly, Chris! Your response is very much appreciated. Best, Storm Crews On Tuesday,

Feb 12

Sean Sutor, … Christen Fleming5

Feb 6

long periods of inactivity and/or no location data

Excellent - thank you for explaining that! Sean On Saturday, January 25, 2025 at 8:41:24 PM UTC-6

unread,

long periods of inactivity and/or no location data

Excellent - thank you for explaining that! Sean On Saturday, January 25, 2025 at 8:41:24 PM UTC-6

Feb 6

Victória, Jesse Alston2

Feb 5

Best Projection for ctmm and rsf.fit

Hi Victória, Tracking data is reprojected automatically when telemetry objects are made, so there is

unread,

Best Projection for ctmm and rsf.fit

Hi Victória, Tracking data is reprojected automatically when telemetry objects are made, so there is

Feb 5

Adam Mortensen, Tyler Hodges2

Jan 25

Problems estimating overlap

Hello Adam, When you are creating your telemetry objects via as.telemetry(), there are datum and

unread,

Problems estimating overlap

Hello Adam, When you are creating your telemetry objects via as.telemetry(), there are datum and

Jan 25

Iran Normande, Christen Fleming3

Jan 24

How to Plot Response Curves from RSF Output

Hi Chris, Thank you. I will do as you say. Best, --- Iran Campello Normande Analista Ambiental /

unread,

How to Plot Response Curves from RSF Output

Hi Chris, Thank you. I will do as you say. Best, --- Iran Campello Normande Analista Ambiental /

Jan 24

Search

Clear search

Close search

Google apps

Main menu