In a script I accidentally did:
A=AsymmetryCalc(InputWorkspace=raw,Alpha=1.0,ForwardSpectra=range(0,32),BackwardSpectra=range(32,64))
Instead of the intended
A=AsymmetryCalc(InputWorkspace=raw,Alpha=1.0,ForwardSpectra=range(1,33),BackwardSpectra=range(33,65))
(data from HiFi, spectra are numbered 1 to 64)
There was no error, but I got a very strange result
(asymmetry squashed close to 1.0 instead of the oscillation centred around zero
I was expecting).
Including non-existent spectra with negative numbers or
greater than the maximum available also doesn’t give any error and looks like
it just omits those from the forward or backward group.
James Lord
Mantid 3.4.20150915.1737 (3.5 beta)