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SaveSESANS v1¶
Summary¶
Save a file using the SESANS format
See Also¶
Properties¶
Name |
Direction |
Type |
Default |
Description |
|---|---|---|---|---|
InputWorkspace |
Input |
Mandatory |
The name of the workspace to save |
|
Filename |
Input |
string |
Mandatory |
The name to use when saving the file. Allowed extensions: [‘.ses’, ‘.sesans’] |
ThetaZMax |
Input |
number |
Optional |
The angular acceptance in the encoding direction |
ThetaZMaxUnit |
Input |
string |
radians |
|
ThetaYMax |
Input |
number |
Optional |
The angular acceptance in the non-encoding direction |
ThetaYMaxUnit |
Input |
string |
radians |
|
EchoConstant |
Input |
number |
Optional |
The spin echo length, in nanometers, probed by a 1A neutron |
Sample |
Input |
string |
Sample name |
|
Orientation |
Input |
string |
Z |
Orientation of the instrument. Allowed values: [‘X’, ‘Y’, ‘Z’] |
OverrideSampleThickness |
Input |
number |
Optional |
The sample thickness in mm. If set, this value will be used instead of the thickness from the input workspace sample |
Description¶
Saves the given workspace to a file which will be formatted in the SESANS data format. A workspace with a single spectrum is expected, where the X values are wavelength and the Y values are polarisation.
The sample thickness from the run metadata is used to normalise the polarisation data.
The OverrideSampleThickness parameter can be used to specify a different value for this if needed.
Usage¶
Example - Loading a file
import os
# Create dummy workspace with sample thickness metadata
dataX = [1,2,3,4,5]
dataY = [6,1,9,14]
dataE = [1,1,4,5]
out_ws = CreateWorkspace(dataX, dataY, dataE)
out_ws.setTitle("Dummy workspace")
out_ws.sample().setThickness(10)
file_path = os.path.join(config["defaultsave.directory"], "example.ses")
# Do a 'roundtrip' of the data
SaveSESANS(InputWorkspace=out_ws, Filename=file_path, ThetaZMax=1,ThetaYMax=1, EchoConstant=1, Sample="Sample")
LoadSESANS(Filename=file_path, OutputWorkspace="in_ws")
# Retrieve loaded workspace from ADS
in_ws = mtd["in_ws"]
print("Y values of loaded workspace = " + str(in_ws.readY(0)))
Output:
Y values of loaded workspace = [ 0.796338 0. 0.179365 0.130324]
Categories: AlgorithmIndex | DataHandling\Text
Source¶
C++ header: SaveSESANS.h
C++ source: SaveSESANS.cpp