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SumRowColumn v1

Summary

SANS-specific algorithm which gives a single spectrum containing the total counts in either each row or each column of pixels in a square LOQ or SANS2D detector bank.

See Also

SumSpectra, SumNeighbours

Properties

Name	Direction	Type	Default	Description
InputWorkspace	Input	MatrixWorkspace	Mandatory	The input workspace, which must contain all the spectra from the bank of interest - no more and no less (so 128x128 or 192x192).
OutputWorkspace	Output	MatrixWorkspace	Mandatory	The name of the workspace in which to store the result.
Orientation	Input	string	Mandatory	Whether to sum rows (D_H) or columns (D_V). Allowed values: [‘D_H’, ‘D_V’]
XMin	Input	number	Optional	The starting X value for each spectrum to include in the summation.
XMax	Input	number	Optional	The ending X value for each spectrum to include in the summation.
HOverVMin	Input	number	Optional	The first row to include in the summation when summing by columns, or vice versa.
HOverVMax	Input	number	Optional	The last row to include in the summation when summing by columns, or vice versa.

Description

This algorithm is the equivalent of the COLETTE “DISPLAY H/V” command. It firsts integrates the input workspace, which must contain all the spectra from the detector of interest - no more and no less (so 128x128 or 192x192), between the X values given. Then each row or column is summed between the H/V_Min/Max values, if given, and the result is a single spectrum of row or column number against total counts.

ChildAlgorithms used

The Integration v1 algorithm is used to sum up each spectrum between XMin & XMax.

Usage

Example - Sum rows of a 128*128 workspace

# Create a workspace with 128*128 spectra each with 5 values (only 128*128 or 192*192 are valid)
ws = CreateSampleWorkspace("Histogram",  NumBanks=1, BankPixelWidth=128, BinWidth=10, Xmax=50)

# Run algorithm with Horizontal orientation
OutputWorkspace = SumRowColumn( ws, "D_H")

print("Input workspace has {} points.".format(ws.getNPoints()))
print("Output workspace has {} points.".format(OutputWorkspace.getNPoints()))

Output:

Input workspace has 81920 points.
Output workspace has 128 points.

Categories: AlgorithmIndex | SANS | Transforms\Grouping

Source

C++ header: SumRowColumn.h

C++ source: SumRowColumn.cpp