v0.7.0

This is the v0.7.0 release of nessai.

This release supports Python 3.8 to 3.10.

Important: this release changes the flow backend from nflows to glasflow. As a result, the minimum PyTorch version has increased to 1.11.0 and upgrading to this release might also require upgrading PyTorch.

Summary of notable changes

• Explicit support for Python 3.10 (#224)
• Change flow backend from nflows to glasflow.nflows (#228)
• Refactor nessai.nestedsampler and nessai.flowmodel into submodules. (#210, #216)
• More logging configuration (#229)
• More checkpointing configuration (#225)
• More options for posterior sampling (#213, #214, #233)
• Change nessai.utils.rescaling.{logit, sigmoid} to closer match torch.{logit, sigmoid} and change fuzz to eps (#218)

Full Changelog: v0.6.0...v0.7.0

v0.6.0

Summary

This release includes various new minor features and bug fixes.

Note: This release removes support for Python 3.6

Main changes

• Remove support for Python 3.6
• Add nessai.plot.corner_plot as an alternative to plot_live_points.
• Style for plots is no longer global and can be disabled.
• Add nessai.config for configuring global settings in nessai
• Add Model.unstructured_view for viewing structured arrays (live points) as standard numpy arrays
• More options for configuring the logger in setup_logger
• More examples
• Minor bug fixes.

For more details see the changelog.

v0.5.1

This patch fixes a recently discovered bug related to the initial sampling from the prior.

Details

The bug occurs very infrequently when the prior is difficult to sample from. It therefore shouldn't affect most runs and is very obvious when it does occur. The clearest indication that this bug has occurred is very few posterior samples (<100).

What's Changed

• Fix initial live points bug by @mj-will in #171

Full Changelog: v0.5.0...v0.5.1

v0.5.0

Summary

This release contains some minor new features, more examples, general improvements to the code base and bug fixes. Most notably:

• Improvements to multiprocessing (now supports user-defined pool)
• Support for vectorised likelihoods

For more details see the full changelog linked below.

Full Changelog: v0.4.0...v0.5.0

v0.4.0

Summary

This release adds a new mode for computing the latent likelihood contour updates various default values to use the new mode (including some defaults for GWFlowProposal). It also includes a few general improvements and minor features.

Constant Volume Mode

Constant volume mode is an option in FlowProposal that fixes the volume of the latent contour based on the number of dimensions in the latent space and the value of volume_fraction. This is the same as fixing the radius of the latent contour.

This significantly improves results for problems where the posterior distribution "rails" against the prior bound and makes results less sensitive to the configuration of the normalising flow. This combined with updated default values means that nessai is more consistent out-of-the-box with no configuration.

Bilby

Constant volume mode is not supported in the current release of bilby . A PR with an update to the interface for nessai is in-progress and should be available in the next release of bilby.

2022-01-14: Last release of bilby includes changes to the nessai interface for this release. (Changelog)

What's Changed

• Add constant volume mode by @mj-will in #125
• Update defaults by @mj-will in #126
• Errors for 1d models by @mj-will in #121
• Add periodic reparameterisation by @mj-will in #127
• Propagate logger by @mj-will in #128
• Use GW reparameterisations by default by @mj-will in #129
• Update GW defaults by @mj-will in #130

Full Changelog: v0.3.3...v0.4.0

v0.3.3

Minor bug fix

What's Changed

• Fix dict_to_live_point bug by @mj-will in #119
• Add acknowledgement to some very helpful folks by @mj-will in #120
• Pin bilby requirement for Python 3.6 by @mj-will in #123

Full Changelog: v0.3.2...v0.3.3

v0.3.2

This release has a few minor improvements and changes to the defaults for couple of the plotting functions. Also fixes a number of typos throughout the documentation and doc-strings.

For full details see the changelog.

Minor improvements and bug fixes

This release has a few minor improvements and bug fixes. It also explicitly adds support for python 3.9, which worked previously but was not tested.

See the changelog for details.

v0.3.0 - Testing, testing and more testing

This release contains a large number of changes related to bugs and issues that were discovered when writing more tests for nessai. It also adds a number of new features and examples.

Note: Runs produced with previous releases are incompatible with this release and cannot be resumed without manual intervention.

See the changelog for further details.

Release 0.2.4

The release includes a number of bug fixes and other minor improvements. For more details see the changelog.