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.. algorithm::
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Description
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Given a PeaksWorkspace with a UB matrix corresponding to a Niggli
reduced cell, this algorithm will allow the user to select a
conventional cell corresponding to a specific form number from the
Mighell paper. If the apply flag is not set, the information about the
selected cell will just be displayed. If the apply flag is set, the UB
matrix associated with the sample in the PeaksWorkspace will be updated
to a UB corresponding to the selected cell AND the peaks will be
re-indexed using the new UB matrix. NOTE: The possible conventional
cells, together with the corresponding errors in the cell scalars can be
seen by running the ShowPossibleCells algorithm, provided the stored UB
matrix corresponds to a Niggli reduced cell.
This algorithm is based on the paper: "Lattice Symmetry and
Identification -- The Fundamental Role of Reduced Cells in Materials
Characterization", Alan D. Mighell, Vol. 106, Number 6, Nov-Dec 2001,
Journal of Research of the National Institute of Standards and
Technology, available from: `nvlpubs <nvlpubs.nist.gov/nistpubs/jres/106/6/j66mig.pdf>`_.
Usage
-----
**Example:**
.. testcode:: ExSelectCellWithForm
ws=LoadIsawPeaks("TOPAZ_3007.peaks")
FindUBUsingFFT(ws,MinD=8.0,MaxD=13.0)
print("Lattice before SelectCellWithForm:")
print(" ".join("{:.9f}".format(x) for x in [lattice.a(), lattice.b(), lattice.c(),
lattice.alpha(), lattice.beta(), lattice.gamma()]))
SelectCellWithForm(PeaksWorkspace='ws', FormNumber=25, Apply=True)
print("\nLattice after SelectCellWithForm:")
print(" ".join("{:.9f}".format(x) for x in [lattice.a(), lattice.b(), lattice.c(),
lattice.alpha(), lattice.beta(), lattice.gamma()]))
Output:
.. testoutput:: ExSelectCellWithForm
Lattice before SelectCellWithForm:
8.60581864273 11.935925461 11.9418127661 107.429088323 98.7529124665 98.9511934747
Lattice after SelectCellWithForm:
14.1310511523 19.247332564 8.60581864273 89.8811706749 105.07133377 89.970386662
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