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Framework Changes

Algorithms

New features

• PolarizationCorrectionFredrikze v1 and PolarizationEfficiencyCor v1 now have InputSpinStates and OutputSpinStates properties for specifying the spin state order in input and output workspace groups.

• Mantid::Kernel::FloatingPointComparison has new functions for efficiently calculating absolute and relative differences.

• The algorithm profiler is now available to Linux users. To enable profiling, the Algorithm Profiling Settings must be set.

• The AlgoTimeRegister class is now exposed to python.

• ExtractMask has a new property UngroupDetectors to allow the output MaskWorkspace to expand the spectra to individual detectors.

• PolarizationCorrectionWildes and PolarizationCorrectionFredrikze have a new AddSpinStateToLog property to add the final spin state into the sample log of each child workspace in the output group.

• EditInstrumentGeometry now adds detectors to a single detector bank, rather than directly to the ComponentInfo root.

• SaveNexusESS now supports append mode, allowing multiple workspaces to be written either one at a time, or as a group workspace, to a single NeXus HDF5 file.

• New algorithm MagneticFormFactorCorrectionMD v1 to scale the MDEvents by the magnetic form factor.

• RebinRagged now exposes FullBinsOnly from the Rebin Algorithm.

• New algorithm CreateMonteCarloWorkspace that creates a randomly distributed workspace by sampling from the probability distribution of the input workspace.

• CompareWorkspaces has a new NaNsEqual boolean property to specify whether NaN values compare as equal.

Bugfixes

• FindPeaksConvolve will no longer segfault due to a racing condition in the parallel loop.

• RemovePromptPulse will now correctly account for the first pulse.

• CompareWorkspaces will no longer evaluate NaN values as equal to any floating point (including inf values).

• ConjoinWorkspaces will now throw an error if the input workspaces’ bins do not match. A new CheckMatchingBins boolean property can be set to False to disable this check.

• Some HeliumAnalyserEfficiency v1 properties have been renamed for consistency (any scripts using the old names will need to be updated):

  • GasPressureTimesCellLength is now PxD

  • GasPressureTimesCellLengthError is now PXDError

  • StartLambda is now StartX

  • EndLambda is now EndX

• LoadNexusProcessed now correctly determines the number of workspaces in a NeXus HDF5 file. It now counts the number of root-level NX_class: NXentry groups. Previously, it simply counted the number of root-level groups, assuming all were of NX_class: NXentry.

• Divide will now correctly set the isDistribution flag to true when dividing two ragged workspaces.

• ConvertUnits now supports histogram ragged workspaces. Ragged workspaces with bin centers (Point rather than BinEdges) still generate errors.

• LoadNGEM now respects Min/MaxEventsPerFrame inputs.

• LoadErrorEventsNexus no longer hangs when when the error bank has zero events.

Data Objects

New features

• EnumeratedStringProperty, which uses EnumeratedString, can be used in C++ based algorithms.

Bugfixes

• TableWorkspace::getMemorySize() now sums memory correctly and returns a more reliable estimate of memory use.

Geometry

Bugfixes

• CrystalStructure will now store and display deuterium as D rather than H.

Python

New features

• A new TableWorkspaceNotEmptyValidator.

• PropertyWithValue types can now be used as output properties from the python API.

• A new testing function assert_not_equal to make testing inequality between workspaces more convenient.

Bugfixes

• Renaming a plotted workspace, where the plot also contains a line, will no longer cause an exception.

Dependencies

New features

• Updated Matplotlib from version 3.7 to version 3.9. See release notes for version 3.8 and version 3.9.

• Updated compiler on Linux to gcc version 13, which should improve performance in some circumstances. The release notes can be found here https://gcc.gnu.org/gcc-13/changes.html.

• Drop support for NumPy version 1. We now build against NumPy v2.0 and support up to v2.1. Read about the changes. Users should note that NumPy 2 introduces some breaking API changes. See the NumPy 2 Migration Guide for more details.

MantidWorkbench

See Mantid Workbench Changes. Release 6.12.0