--- In tuning-math@y..., "genewardsmith" <genewardsmith@j...> wrote:

> Maple has a graph theory package, which allows me to take a scale >and compute its connectivity fairly easily.

Is this the same as Dave Keenan's connectivity?

>What does Matlab, etc. have?

I'm not sure if Matlab has a graph theory toolbox, but I probably wouldn't be willing to pay for it anyway. Look at the Matlab website - - I have the basic package, plus the optimization and statistics toolboxes.

--- In tuning-math@y..., "paulerlich" <paul@s...> wrote: > --- In tuning-math@y..., "genewardsmith" <genewardsmith@j...> wrote: > > > Maple has a graph theory package, which allows me to take a scale > >and compute its connectivity fairly easily. > > Is this the same as Dave Keenan's connectivity?

Almost certainly not. I assume you are referring to where I say e.g. a meantone diatonic scale is 86% connected at the 9-limit. Which means that of the 21 possible dyads (considered octave-equivalently) 18 of them are (reasonable approximations of) 9-limit ratios.

I assume that Gene's measure gave the number of connected subgraphs that were disconnected from each other.