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Framework Changes

Algorithms

New features

• Added a load compression parameter MinSizeCompressOnLoad for ref: AlignAndFocusPowderFromFiles and ref: SNSPowderReduction

• Implemented an alternative input option Instrument Definition File in GenerateGroupingSNSInelastic, selecting the new InstrumentDefinitionFile option in instrument drop down menu will create a new field allowing users selecting older instrument definition files.

• Implemented the FilterBadPulses functionality in LoadEventNexus, adding the new FilterBadPulsesLowerCutoff parameter.

• H5 exceptions are now caught with improved error reporting.

• A new SpinStates property has been added to PolarizationCorrectionWildes v1 and PolarizationEfficiencyCor v1 to allow the order of the workspaces in the output Workspace Group to be set.

• Improve time-scaling performance of CombineDiffCal, and add extra validations.

• Changed use of scipy.interpolate.interp2d in NMoldyn4Interpolation to use scipy.interpolate.RectBivariateSpline, since interp2d has been removed in version 1.14 of scipy. See reference documentation here (https://docs.scipy.org/doc/scipy/reference/generated/scipy.interpolate.interp2d.html)

• Add support for Ragged Workspaces to CompareWorkspaces.

• New version 2 of LoadEventAsWorkspace2D that adds FilterByTime functionality.

• Add support for Ragged Workspaces to binary operations. Plus, Minus, Divide and Multiply.

• New version 2 of GenerateGroupingPowder that will save the grouping file with groups starting at 1 instead of 0 to make them consisted with GroupingWorkspace. The FileFormat parameter has also been removed as it will now be determined from the extension of GroupingFilename.

Bugfixes

• Fixed an unreliable segmentation fault in the ExtractFFTSpectrum algorithm.

• The LoadIsawUB algorithm now correctly adds the UB to the first experiment info when the input workspace has more than one.

• SaveNexusProcessed and LoadNexusProcessed has been fixed to correctly work with Ragged Workspaces.

• The ScaleX algorithm has had a 95% speedup when using the “InstrumentParameter” property.

• Remove reference to numpy.distutils in IntegratePeaks1DProfile, since as of NumPy 1.23.0 it is deprecated.

• Fixed bug when all sample times are before 01/01/1991

Removed

• The CheckWorkspacesMatch algorithm was deprecated in Release 3.9.0 and has now been removed. Use CompareWorkspaces instead.

• The ConvertEmptyToTof algorithm was deprecated in Release 3.9.0 and has now been removed.

• The AddNote algorithm was deprecated in Release 3.6.0 and has now been removed. Please use Comment instead.

Fit Functions

New features

• Added the SpinDiffusion fit function in the Muon category.

Bugfixes

Data Objects

New features

Bugfixes

• Added a + 1 to EventWorkspace::sortAll to prevent grainsize from being 0.

Python

New features

• Creates documentation for mantid.dataobjects python bindings

• The python function assert_almost_equal for testing if two modules are within a tolerance was reworked

Bugfixes

• Fixed error in the log about load_module() being deprecated in Python 3.12.

Dependencies

New features

• Updated compiler on Linux to gcc version 12, which should improve performance in some circumstances

Bugfixes

• Allow versions of pycifrw greater than 4.4.1

• Add a run constraint to the mantid package to constrain the optional matplotlib dependency to v3.7. Previously it was possible to install any version of matplotlib alongside mantid in a conda environment, but we cannot guarantee compatibility for any version other than 3.7.

MantidWorkbench

See Mantid Workbench Changes. Release 6.11.0