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The variables <math>c_{r,i}, d_{r,i}</math> and <math>c_{t,i}, d_{t,i}</math>are not properly introduced. While the indices ''r'' and ''t'' refer to the reference and the test light source, ''i'' refers to the test color. However, it is not explained what the connection of ''r,i'' or ''t,i'' means. If it refers to the '''apparent''' chromaticity of the ''i''th source color illuminated by light type ''r'' or ''t'', this should be explained explicitely and unambigously.--[[User:SiriusB|SiriusB]] ([[User talk:SiriusB|talk]]) 15:08, 6 January 2012 (UTC)
:Solved so far. The web reference which contains the Matlab script clarifies the question.
:However, there is now another question: Where do the numbers in the example calculation come from? Are they extracted from some citeable reference or derived by numerical means? If the former is true, please give all references. If the latter is true, please give a detailed description of methods and sources, in particular: 1. The source for the F4 spectrum, 2. the numerical method for the chromaticity calculation (especially whether discrete values for e.g. 5 nm steps are added or an accurate interpolation and quadrature algorithm, e.g. cubic splines and Simpson's integration rule or better, is used. Inaccurate, non-repeatable description of the methods may render this part as original research. I have made calculations on this topic and found very good agreement but, however, no exact match of the particular DeltaUVW or Ri values. In addition, I can almost exactly reproduce the chromaticities for all F spectra with F4 as the only exception; source of data is one of the (equivalent) weblinks given at the and of the article.--[[User:SiriusB|SiriusB]] ([[User talk:SiriusB|talk]]) 20:49, 15 November 2012 (UTC)
== Typical values / Light Source Chart ==
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