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FilterByXValue v1

../_images/FilterByXValue-v1_dlg.png

FilterByXValue dialog.

Summary

Filters events according to a min and/or max value of X.

See Also

FilterByTime, FilterByLogValue, FilterBadPulses

Properties

Name

Direction

Type

Default

Description

InputWorkspace

Input

EventWorkspace

Mandatory

The input workspace.

OutputWorkspace

Output

EventWorkspace

Mandatory

The output workspace.

XMin

Input

number

Optional

The minimum X value (in the units of the input workspace) for which events will be retained (default: event list min)

XMax

Input

number

Optional

The maximum X value (in the units of the input workspace) for which events will be retained. Must be greater than XMin. (default: event list max)

Description

This algorithm filters events outside of the given values (in whatever units the workspace possesses). This can be a one or two-sided filter depending on which of xmin & xmax are given. This algorithm pays no attention whatsoever to any binning that has been set on the input workspace (though it will be carried over to the output). If you need to affect the bin boundaries as well, or want to remove some spectra/pixels, consider using CropWorkspace v1 instead.

Usage

Example: Applying a Max in TOF

ws = CreateSampleWorkspace("Event",BankPixelWidth=1)
print("%i events before filtering" % ws.getNumberEvents())
wsOut = FilterByXValue(ws,XMax=15000)
print("%i events after filtering" % wsOut.getNumberEvents())

Output:

1900 events before filtering
1550 events after filtering

Example: Applying Max and Min in Wavelength

ws = CreateSampleWorkspace("Event",BankPixelWidth=1)
ws = ConvertUnits(ws,"Wavelength")
print("%i events before filtering" % ws.getNumberEvents())
wsOut = FilterByXValue(ws,XMin=1,XMax=3)
print("%i events after filtering" % wsOut.getNumberEvents())

Output:

 1900 events before filtering
 11... events after filtering

Categories: AlgorithmIndex | Events\EventFiltering

Source

C++ header: FilterByXValue.h

C++ source: FilterByXValue.cpp