>Psychtoolbox>PsychColorimetric

[LMS, factorsLMS] = MacBoynToLMS(lsY,T_cones,T_lum)

Convert Macleod-Boynton chromaticity together with luminance to
cone coordinates.

This is designed to be used with the modern form of LMSTOMacBoyn,
namely
lsY = LMSToMacBoyn(LMS2,T_cones,T_Y,1);
as this form returns both ls and the corresponding luminance. Passing
both cone fundamentals and luminance sensitivity (T_cones and T_Y) keeps
the routine general. The scaling of s is also consistent when the calls
are done in this way.

See usage example in LMSToMacBoyn.