Improve the usability of ProcessBackground

[Wenduo Zhou]

Now in functional option 'Select background points', users will have to do a fitting in MantidPlot, which is not convenient.

Add an option such that this algorithm will fit the selected background points before it is returned.

[Wenduo Zhou]

Added 2 more algorithm properties. Refs #8472.

Changeset: 7a38ac156c903e9f0a57b7e9ee6c73dd9309c4ff

[Wenduo Zhou]

Made the new feature work. Refs #8472.

Changeset: 172f80565bdd1ba4d0a0ff1826a1a93753cc0d13

[Wenduo Zhou]

Expanded unit test for new feature. Refs #8472.

Changeset: 1b78d72d8a171f11b8ffe0b49c09ce70fa52f552

[Wenduo Zhou]

For tester

1. Download the files
2. Run script verify8472.py
3. You should see that there are 3 spectra in output workspace PG3_15035_Bkgd01. Spectrum 2 is the fitted background; and spectrum 3 is the difference. Output workspace PG3_15035_BkgdParameter01 contains the parameters' fitted value. It can be used as the input ProcessBackground.

[Wenduo Zhou]

Renamed a property b/c python. Refs #8472.

Changeset: 95e6bdf77aaddb0ff722ff692885df4e1f61e009

Mantid's python script does not accept any WorkspaceProperty whose name does not end with Workspace.

[Karl Palmen]

The output workspace is not suitable as an input "BraggPeakTableWorkspace" of ProcessBackground as asserted, because the following error occurred when I attempted to run ProcessBackground

Input Bragg peak table workspace does not have TOF_h and/or FWHM

[Wenduo Zhou]

The new feature is only applied to function option (i.e., 'Option') being 'SelectBackgroundPoints'. BraggPeakTableWorkspace is an optional input required by 'Option' equal to 'RemovePeaks'.

Meanwhile, BraggPeakTableWorkspace is a table workspace requiring 2 columns, TOF_h and FWHM. This error message means that the input BraggPeakTableWorkspace is not correct.

[Gesner Passos]

Variation of the script outputs error:

LoadAscii(Filename=r'PG3_15035-3.dat',OutputWorkspace='PG3_15035-3',Unit='TOF')
ProcessBackground(InputWorkspace='PG3_15035-3',OutputWorkspace='PG3_15035-Bkgd01',Options='SelectBackgroundPoints',SelectionMode='FitGivenDataPoints',BackgroundOrder='6', 
	BackgroundPoints='10082,10591,11154,12615,13690,13715,15073,16893,17764,19628,21318,24192,35350,44212,50900,60000,69900,79000',NoiseTolerance='0.5',
	UserBackgroundWorkspace='UserObserver',OutputBackgroundParameterWorkspace='PG3_15035_BkgdParameters01', OutputBackgroundType='FullprofPolynomial')

ValueError: Background of type FullprofPolynomial is not supported.

[Gesner Passos]

Is this expected?

[Wenduo Zhou]

Removed background option FullprofPolynomial. Refs #8472.

Changeset: 64a359f0f2f4a267df8c354fb790b9ffa35fdf14

[Wenduo Zhou]

Support for FullprofPolynomial requires more input properties and unit test. It will be solved in a new ticket. For this ticket, the option to use this background function is removed.

[Vickie Lynch]

Merge remote branch 'origin/feature/8472_process_bkgd_semiauto'

Full changeset: ​f81278f9e4c6655c765d0680e62992ef8316d8d2

[Stuart Campbell]

This ticket has been transferred to github issue ​9316