dtnguyen2

minpack Levenberg-Marquardt algorithm using Adept autodiff lib.

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Kudos for any/all for making this package available. I have recently modified lmdif/lmder to use the Adept automatic differentiation library, please see https://github.com/sherpa/sherpa/pull/577 for details.

WIP rework PR #617

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#Note This PR is basically PR #617 (but without the test script for now) so @anetasie can start testing The requirements for this PR can be found at: https://cxcjira.cfa.harvard.edu/confluence/display/SH/Update+pyBlocxs #...

Enable LevMar and NelderMead to transform to deal with bounded limits

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# Note This PR will enable Sherpa's ```LevMar``` and ```NelderMead``` (or any unconstrained) optimization methods to handle simple bounds by transforming.

allow user to use minuit if they install it

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If ```iminuit``` is not available: ```bash (testing-PR) [dtn@devel12 optionalMinuit]$ pip uninstall iminuit Found existing installation: iminuit 2.9.0 Uninstalling iminuit-2.9.0: Would remove: /export/miniconda/envs/testing-PR/lib/python3.9/site-packages/iminuit-2.9.0.dist-info/* /export/miniconda/envs/testing-PR/lib/python3.9/site-packages/iminuit/* Proceed (Y/n)? Y Successfully uninstalled iminuit-2.9.0 ```...

A user had asked: > Ever compared to MPFIT (IDL)? #679 So for the record, I was going to issue the work here as a PR so you will have...

WIP: rm mutable default arguments

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# Note Simple fixes to issue #95. One could eliminate a few more cases but they require a lot more changes

WIP: plot_source_component was not using the high resolution grid for plotting

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# Note This PR fixes issue #822

WIP: Make sherpa's xspecvar to be same as xspec, remove +1 in error and dr…

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…op calc in stat if count==0

Performance Improvements

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Model evaluation - Model caching, not to recompute models with frozen parameters - Paralellization with intelligent parsing of the model expression Slowness in fitting X-ray spectra - issues in simultaneous...