Comparing the Voynich by Word Position Profiles

[Jorge_Stolfi]

In other words: at position 1 we might have 40% of one character, 30% of another, 20% of a third, and so on. Just the shape of the distribution, not the labels.

That is enough  information to compute the entropy of the first character.  For the entropy of the other characters one would need the distribution of the first n characters, not just the nth character,

I don't put much faith in this kind of analysis because the token and lexeme length distributions of Voynichese are quite different from those of "European" languages (Indo-European, Finno-Ugric, Semitic, Turkic, Basque).   

Thus the 8th letter of an "European" word would at best correspond to maybe half of the 4th letter of a Voynichese word.  But in fact we know that the character entropy of Voynichese words is spread out more evenly along the word than that of "European" words, so that the correspondence is not even linear.

And moreover these statistics are highly dependent on the spelling system, much more than on the language, and even on the nature of the text.  For instance, the Voynichese statistics would be quite different if the qo and y prefixes of Voynichese words were always split off, or always joined to the next word. Or if one spells Arabic "alkitab" as "al-kitab" or "al kitab" or "alktab"...

All the best, --jorge