MaskAngle dialog.
Table of Contents
| Name | Direction | Type | Default | Description |
|---|---|---|---|---|
| Workspace | Input | Workspace | Mandatory | Input workspace |
| MinAngle | Input | number | 0 | Angles above MinAngle are going to be masked |
| MaxAngle | Input | number | 180 | Angles below MaxAngle are going to be masked |
| Angle | Input | string | TwoTheta | Which angle to use. Allowed values: [‘TwoTheta’, ‘Phi’] |
| MaskedDetectors | Output | int list | List of detector masked, with scattering angles between MinAngle and MaxAngle |
Algorithm to mask detectors with scattering angles in a given interval (in degrees) By default MinAngle=0, MaxAngle=180, so if no keywords are set, all detectors are going to be masked Returns a list of detectors that were masked
When masking the phi angle the absolute value of phi is used.
Note
To run these usage examples please first download the usage data, and add these to your path. In MantidPlot this is done using Manage User Directories.
Two theta example
#Load a workspace
ws = Load("CNCS_7860")
#Do the masking for direct beam
mask = MaskAngle(ws, MinAngle=0, MaxAngle=10)
print("The algorithm has masked {} detectors".format(mask.size))
#to test check a couple of detectors
inst = ws.getInstrument()
print("Is the minimum element in the mask list (detector {}) masked? {}".format(mask.min(), inst.getDetector(int(mask.min())).isMasked()))
print("Is the maximum element in the mask list (detector {}) masked? {}".format(mask.max(), inst.getDetector(int(mask.max())).isMasked()))
print("Is a detector outside the list masked (for example detector 100)? {}".format(inst.getDetector(100).isMasked() ))
Output:
The algorithm has masked 1516 detectors
Is the minimum element in the mask list (detector 35126) masked? True
Is the maximum element in the mask list (detector 38601) masked? True
Is a detector outside the list masked (for example detector 100)? False
The instrument view would look like:
Phi example
#Load a workspace
ws = Load("CNCS_7860")
#Do the masking for direct beam
mask = MaskAngle(ws, MinAngle=30, MaxAngle=150, Angle='Phi')
print("The algorithm has masked {} detectors".format(mask.size))
#to test check a couple of detectors
inst = ws.getInstrument()
print("Is the minimum element in the mask list (detector {}) masked? {}".format(mask.min(), inst.getDetector(int(mask.min())).isMasked()))
print("Is the maximum element in the mask list (detector {}) masked? {}".format(mask.max(), inst.getDetector(int(mask.max())).isMasked()))
print("Is a detector outside the list masked (for example detector 100)? {}".format(inst.getDetector(100).isMasked() ))
Output:
The algorithm has masked 6348 detectors
Is the minimum element in the mask list (detector 29568) masked? True
Is the maximum element in the mask list (detector 44287) masked? True
Is a detector outside the list masked (for example detector 100)? False
The instrument view would look like:
Categories: Algorithm Index | Transforms\Masking
Python: MaskAngle.py (last modified: 2018-10-19)