Paul van Dam Bates
@paul-vdb.bsky.social
Ecological statistician at Fisheries and Oceans Canada. Estimating salmon species composition on the Fraser River using hydroacoustics. Developing quadrature methods for #NIMBLE
For anyone trying to do matrix exponentials in #NIMBLE, here is a version I wrote that hacks sparse linear algebra for solving exp(A) %*% v. I'll put it into the package in a future update.
July 18, 2025 at 9:09 PM
For anyone trying to do matrix exponentials in #NIMBLE, here is a version I wrote that hacks sparse linear algebra for solving exp(A) %*% v. I'll put it into the package in a future update.
Discrete movement in continuous time. The data look like below with blue points detectors that detected an animal. Red lines the latent movement path of the animal.
July 18, 2025 at 9:05 PM
Discrete movement in continuous time. The data look like below with blue points detectors that detected an animal. Red lines the latent movement path of the animal.
More encouraging results with a few more animals (N=50)
July 18, 2025 at 9:04 PM
More encouraging results with a few more animals (N=50)
First simulated run on a new SCR model that does animal movement in continuous time using an OU process. Only 1000 iterations of the MCMC, but very encouraging results!
July 17, 2025 at 10:14 PM
First simulated run on a new SCR model that does animal movement in continuous time using an OU process. Only 1000 iterations of the MCMC, but very encouraging results!
Not sure. It should be added if not. Here is a basic example that I have not actually run so may need to be edited. But data input in this case would be the animal ID to link it to the cached count. Let me know if it doesn’t run.
March 16, 2025 at 4:50 PM
Not sure. It should be added if not. Here is a basic example that I have not actually run so may need to be edited. But data input in this case would be the animal ID to link it to the cached count. Let me know if it doesn’t run.
Working on quadrature in NIMBLE (future package - nimbleQuad). Here is a nice trick for those who have to sum up probabilities on the real (not log) scale and worry about very small probabilities and numerical accuracy. Probably a niche crowd... :)
December 11, 2024 at 6:43 PM
Working on quadrature in NIMBLE (future package - nimbleQuad). Here is a nice trick for those who have to sum up probabilities on the real (not log) scale and worry about very small probabilities and numerical accuracy. Probably a niche crowd... :)