sw_tofres#

Syntax#

spectra = sw_tofres(spectra,Name,Value)

Description#

spectra = sw_tofres(spectra,Name,Value) simulates the finite bin size of the cuts of direct TOF neutron scattering data. It calculates the spectrum at multiple points within the given bin volume and sums them up. The function is usefull if relatively large bins were used to analyse the data due to low signal to noise ratio of the measurement.

Input Arguments#

spectra: Input structure, contains calculated correlation functions withouth the resolution effect.

Name-Value Pair Arguments#

'method'

String that determines the method to generate the \(Q\) points, options:

'random' The bin volume will be randomly sampled.
'grid' The bin volume will be split up to a finer regular grid.

'dQ'

Row vector with 3 elements. The width of the \(Q\) bin along the three reciprocal lattice directions. The spectrum will be integrated in the \(Q\pm (\delta Q/2)\) range. Default value is [0.1 0.1 0.1].

'nQ'

Row vector with 3 elements when method is grid and gives the number of \(Q\) points along the three reciprocal lattice directions to average over. When method is random it is a scalar that determines the number of random \(Q\) points.

'fid'

Defines whether to provide text output. The default value is determined by the fid preference stored in swpref. The possible values are:

0 No text output is generated.
1 Text output in the MATLAB Command Window.
fid File ID provided by the fopen command, the output is written into the opened file stream.

'tid'

Determines if the elapsed and required time for the calculation is displayed. The default value is determined by the tid preference stored in swpref. The following values are allowed (for more details see sw_timeit):

0 No timing is executed.
1 Display the timing in the Command Window.
2 Show the timing in a separat pup-up window.

Output Arguments#

spectra: Same as the input except that it contains the calculated intensity in the swConv field.