dfm/emcee

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The Python ensemble sampling toolkit for affine-invariant MCMC

Stars: 1.6k
Forks: 440
Open beginner issues: 0
Indexed issues: 57

Dominant language: Python
License: MIT
Last GitHub push: Jul 26, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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57 open issues indexed

HDFBackend not passing compress option Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

dfm/emcee#569 · Opened Jun 17, 2026
Citation files Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

dfm/emcee#568 · Opened May 9, 2026
centering in autocorr Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dfm/emcee#554 · 1 comment · Opened Nov 29, 2025
tkinter runtime error Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#552 · Opened Nov 3, 2025
Minor typo in the docs Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

dfm/emcee#537 · Opened Aug 7, 2025
Weird sampling behaviour when sampling parameter in log space Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#535 · Opened Feb 21, 2025
Issues with Parameter Extraction from Emcee Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#522 · Opened Jun 4, 2024
Modified Walk Moves Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

dfm/emcee#521 · Opened May 22, 2024
Trying to use Blobs with the vectorize=True keyword returns a ValueError("incompatible input dimensions") Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

dfm/emcee#516 · 1 reaction · Opened Apr 17, 2024
(solved) issue with sampler stalling with multiprocessing Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

dfm/emcee#502 · 6 reactions · Opened Feb 7, 2024
JAX implementation of emcee Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

dfm/emcee#499 · 5 comments · Opened Jan 26, 2024
In emcee.EnsembleSampler threads command is not working Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#478 · Opened Sep 1, 2023
Add set_description to `pbar._NoOpPBar` Open

Difficulty 1/5 Under an hour Newbie friendliness 68/100

dfm/emcee#476 · 1 comment · Opened Aug 28, 2023
Investigate the use of optree for structured parameter sets Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

dfm/emcee#470 · Opened Jun 6, 2023
HDF backend file size Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dfm/emcee#451 · Opened Jan 12, 2023
My samplers do not converge to maximum likelihood Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

dfm/emcee#448 · Opened Nov 10, 2022
Parallelization of emcee is working not as fast as expected Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dfm/emcee#447 · 4 comments · Opened Nov 3, 2022
Add v3 JOSS citation info to README and docs Open

Documentation

Difficulty 1/5 Under an hour Newbie friendliness 45/100

dfm/emcee#446 · 1 comment · Opened Oct 31, 2022
Issue on class emcee.moves.GaussianMove(cov, mode='vector', factor=None) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

dfm/emcee#445 · Opened Oct 18, 2022
3.1.3: sphinx warnings `reference target not found` Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dfm/emcee#441 · 12 comments · Opened Sep 28, 2022
3.1.3: pytest warnings Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

dfm/emcee#440 · 1 comment · Opened Sep 28, 2022
emcee and joblib Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

dfm/emcee#434 · 2 comments · Opened Aug 21, 2022
Probability function returned NaN Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

dfm/emcee#415 · 3 comments · Opened Dec 13, 2021
Sampling quaternion variables constrained to a manifold Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

dfm/emcee#408 · 3 comments · Opened Sep 29, 2021
Blobs function error Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dfm/emcee#407 · 4 comments · Opened Sep 24, 2021
Multiprocessing the Python module 'emcee', but not all CPU cores on the machine are being used Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

dfm/emcee#405 · 6 comments · Opened Sep 19, 2021
HDF backend slow Open

Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dfm/emcee#393 · 3 comments · 3 reactions · Opened Jun 24, 2021
Reading backend while it is being written sometimes throws an error Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dfm/emcee#389 · 8 comments · Opened Jun 10, 2021
Support modern pseudo-random number generators from Numpy Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dfm/emcee#383 · 1 comment · Opened Mar 23, 2021
What does the parameter "thin" mean? Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

dfm/emcee#382 · 3 comments · Opened Mar 23, 2021
failed to save the state of the chain to a file "chain.dat" Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

dfm/emcee#381 · 1 comment · Opened Feb 19, 2021
MCMC MH move proposal Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

dfm/emcee#379 · 7 comments · Opened Feb 15, 2021
multiprocessing.pool.RemoteTraceback Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#377 · 1 comment · Opened Jan 22, 2021
issue with acceptance_fraction sampler property when using sample(...,store=False) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

dfm/emcee#375 · 1 comment · Opened Dec 31, 2020
AutocorrError: The chain is shorter than 50 times the integrated autocorrelation time for 2 parameter(s). Use this estimate with caution and run a longer chain! Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

dfm/emcee#374 · 1 comment · Opened Dec 26, 2020
invalid value encountered in double_scalars lnpdiff = f + nlp - state.log_prob[j] Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#370 · 5 comments · Opened Dec 20, 2020
Multiprocessing Tutorial Example Not Working Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

dfm/emcee#365 · 6 comments · 1 reaction · Opened Nov 10, 2020
labels for parameters in nDim Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#364 · 2 comments · Opened Nov 9, 2020
different results when using multiprocessing Pool() (sometimes) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dfm/emcee#351 · 2 comments · Opened Aug 4, 2020
OSError: [Errno 24] Too many open files Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#350 · 2 comments · Opened Jul 31, 2020
Correct way to calculate the model evidence Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

dfm/emcee#348 · 5 comments · Opened Jul 10, 2020
why sampler.get_autocorr_time() gives nans! Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dfm/emcee#342 · 8 comments · Opened Apr 16, 2020
emcee and MPI Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

dfm/emcee#341 · 1 comment · Opened Apr 14, 2020
Documentation for integrated_time still specifies discontinued ``axis`` keyword argument Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

dfm/emcee#337 · 2 comments · Opened Mar 11, 2020
a small issue with the global_variable+pool approach when using Python 3.8 in macOS Open

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

dfm/emcee#335 · 1 comment · Opened Feb 29, 2020
ValueError: set_state can only be used with legacy MT19937state instances. Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dfm/emcee#331 · 1 comment · Opened Nov 25, 2019
Getting `divide by zero` warning when not storing chain in memory Open

Feature Request

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dfm/emcee#329 · 1 comment · Opened Nov 8, 2019
EnsembleSampler error Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

dfm/emcee#328 · 1 comment · Opened Nov 6, 2019
Emcee and MPI with mpi4py Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

dfm/emcee#310 · 3 comments · Opened Sep 25, 2019
Running emcee with mpi and openmp Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

dfm/emcee#286 · 2 comments · Opened Jan 10, 2019

dfm/emcee

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