6.4

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SaveYDA v1

../_images/SaveYDA-v1_dlg.png

SaveYDA dialog.

Summary

Save Workspace to a Frida 2.0 yaml format

Properties

Name Direction Type Default Description
InputWorkspace Input MatrixWorkspace Mandatory Workspace name for input
Filename Input string Mandatory The name to use when writing the file

Description

This algorithm exports a given Workspace2D to a YAML format which supposed to be read by the Frida 2.0 software for further data analysis. The algorithm has been developed for the TOFTOF instrument, but can be used for other TOF instruments as well.

Limitations

The input workspace must be a Wokspace2D with an instrument. The X unit of the workspace has to be ‘DeltaE’ Y axis must be a Spectrum axis or it’s unit has to be ‘Momentum Transfer’.

Usage

Example - SaveYDA

import os
import numpy as np
from sys import stdout

# create x and y data
dataX = np.arange(12).reshape(3, 4)
dataY = np.arange(9).reshape(3, 3)

# create sample workspace
ws = CreateWorkspace(DataX=dataX, DataY=dataY, DataE=np.sqrt(dataY), NSpec=3, UnitX="DeltaE")

# add Instrument
LoadInstrument(ws,True,InstrumentName="TOFTOF")

#add sample Logs
AddSampleLog(ws,"proposal_number","3")
AddSampleLog(ws, "proposal_title", "Proposal Title")
AddSampleLog(ws,"experiment_team","Experiment Team name")
AddSampleLog(ws,"temperature","200.0", LogUnit="F")
AddSampleLog(ws,"Ei","1.0",LogUnit="meV")

# test file name
filename = os.path.join(config["defaultsave.directory"], "TestSaveYDA.yaml")

# save file
SaveYDA(ws, filename)

with open(filename,'r') as f:
    for i in range(12):
        stdout.write(f.readline())

Output:

Meta:
  format: yaml/frida 2.0
  type: generic tabular data
History:
  - Proposal number 3
  - Proposal Title
  - Experiment Team name
  - data reduced with mantid
Coord:
  x: {name: w, unit: meV}
  y: {name: 'S(q,w)', unit: meV-1}
  z: [{name: 2th, unit: deg}]

Categories: AlgorithmIndex | DataHandling\Text