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Re: VMs: Overfitting the Data



Koontz John E wrote:

It's easy to show that a three slider wheel is equivalent to a Rugg
matrix. Cut the matrix apart into its constituent groups of three columns
(triplets of prefix, midfix, and suffix columns).

If you prefer you can skip the last
ouroboros-style taping and the awkward stretching exercise and just cut
the three columns apart so that you have a prefix column, a midfix column,
and a suffix column.  Instead of rotating the rings past each other, you
just slide your strips up and down next to each other.

But this leaves out the constraint imposed by the grill overlays. These block out some potential pairs; thus the output of a Rugg grill is a subset of the prefix-root-suffix paradigm.


The Firth paradigm is an interesting subset of Voynichese, accounting for about 80% of the characters in the VMs.

http://www.ic.unicamp.br/~stolfi/voynich/mirror/reeds/firth/24.txt

But it generates 483 words, more than the core ~280 words that account for that. It would be interesting to create a grill to restrict the Firth paradigm to that.

Dennis





Either way, any particular alignment of the three sliders is functionally equivalent to making a grill with three windows in it. Sliding your next slider up or down n rows is like offsetting your next window down or up n rows. Reading across the three sliders on some random radius (or row) in the proper order is functionally equivalent to plopping down the grill on the matrix at some random location and reading the windows in the proper order.

QED

Well, QED modulo edge effects.  If you consider it legitimate to place a
grill on a matrix so that one or more windows is off the matrix, counting
that window as blank, then, you'll find you can't do that when you tape
the threes of matrix columns together.  Now a window off the bottom of the
matrix will read into the corresponding column in the next three.  I
believe you could handle this by allowing as many blank rows between
concatentated columns as you are prepared to allow total cumulative
effective offsets in your grills.  I'll leave this as an exercise for the
reader, because it looks complicated.

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