>Psychtoolbox>PsychColorimetric

S = MakeItS(wls)

If argument is a [start delta n] description, it is
left alone.

If passed length is not a [start delta n] description,
convert it to one. Formats handled are a list of evenly
spaced wavelengths or a struct with fields start, step, numberSamples.

Format error checking could be more agressive.

7/26/02 dhb Allow struct format too.