.. algorithm::

.. summary::

.. relatedalgorithms::

.. properties::

Description
-----------

Load incident spectrum and detector efficiency correction file
containing spectra for each detector. The spectra are created by
"TOPAZ\_spectrum.py" from files of vanadium or TiZr and background.

Usage
-----

.. testcode:: LoadIsawSpectrum

    #Write a ISAW Spectrum file
    import mantid
    filename=mantid.config.getString("defaultsave.directory")+"loadIsawSpectrumTest.dat"
    f=open(filename,'w')
    f.write("# Column  Unit    Quantity\n")
    f.write("# ------  ------  --------\n")
    f.write("#      1  us      time-of-flight\n")
    f.write("#      2  counts  counts per us corrected for vanadium rod absorption\n")
    f.write("#      3  A       wavelength\n")
    f.write("#      4  counts  counts per us uncorrected for absorption\n")
    f.write("#      5          transmission\n")
    f.write("#\n")
    f.write("Bank 1     DetNum 17\n")
    f.write("      400.000      -23.878       0.0856      -22.409       0.9385\n")
    f.write("      401.600      -23.878       0.0859      -22.409       0.9385\n")
    f.write("      403.200      -23.879       0.0863      -22.409       0.9385\n")
    f.write("      404.800      -23.879       0.0866      -22.409       0.9385\n")
    f.write("      406.400      -23.879       0.0870      -22.409       0.9384\n")
    f.write("      408.000      -21.966       0.0873      -20.614       0.9384\n")
    f.close()


    ow = LoadIsawSpectrum(SpectraFile=filename,InstrumentName="TOPAZ")

        #check the results
    print("x= {}".format(ow.readX(0)))
    print("y= {}".format(ow.readY(0)))

.. testcleanup:: LoadIsawSpectrum

    import os,mantid
    filename=mantid.config.getString("defaultsave.directory")+"loadIsawSpectrumTest.dat"
    os.remove(filename)

Output:

.. testoutput:: LoadIsawSpectrum

    x= [399.2 400.8 402.4 404.  405.6 407.2 408.8]
    y= [-0.0047017  -0.0047017  -0.00470189 -0.00470189 -0.00470189 -0.00432521]

.. categories::

.. sourcelink::