FFTSmooth

From MantidProject

Contents 1 Summary 2 Properties 3 Description 3.1 Zeroing 4 Source Code

Summary

Performs smoothing of a spectrum using various filters.

Properties

Order	Name	Direction	Type	Default	Description
1	InputWorkspace	Input	Workspace2D	Mandatory	The name of the input workspace. It must have regular x-bins.
2	OutputWorkspace	Output	Workspace2D	Mandatory	The name of the output workspace.
3	WorkspaceIndex	Input	integer	Mandatory	The index of the spectrum in the input workspace smoothing.
4	Filter	Input	String	"Zeroing"	The smoothing method.
5	Params	Input	String	""	The parameters for the filter (if more than one - comma separated).

Description

FFTSmooth uses FFT algorithm to create a Fourier transform of a spectrum, applies a filter to it and transforms it back. The filters remove higher frequencies from the spectrum which reduces the noise.

Currently only one filter is impemented:

Zeroing

• Filter: "Zeroing"
• Params: "n" - an integer greater than 1 meaning that the Fourier coefficients with frequencies outside the 1/n of the original range will be set to zero.

The resulting spectrum has the same size as the original one.

Source Code

Header FFTSmooth.h

Source FFTSmooth.cpp