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BufNNDSVD -> BufNMFSeed #141

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Merged
tremblap merged 2 commits into from
Jun 13, 2022
Merged

BufNNDSVD -> BufNMFSeed #141

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9e4d205
change the doc
tremblap Jun 11, 2022
5760112
forgot to change the code sample file name
tremblap Jun 11, 2022
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2 changes: 1 addition & 1 deletion doc/BufNNDSVD.rst → doc/BufNMFSeed.rst
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Expand Up @@ -6,7 +6,7 @@
:description: Find Initial Bases and Activations for BufNMF
:discussion:

BufNNDSVD uses Nonnegative Double Singular Value Decomposition which can help decide how to initialise BufNMF, by suggesting how many components to request (and what bases and activations to seed) in order to account for a certain percentage of the variance in a buffer. In general, using this process to seed a BufNMF decomposition should substantially increase the speed with which BufNMF converges and avoid especially poor local minima.
BufNMFSeed uses Nonnegative Double Singular Value Decomposition which can help decide how to initialise BufNMF, by suggesting how many components to request (and what bases and activations to seed) in order to account for a certain percentage of the variance in a buffer. In general, using this process to seed a BufNMF decomposition should substantially increase the speed with which BufNMF converges and avoid especially poor local minima.

See http://nimfa.biolab.si/nimfa.methods.seeding.nndsvd.html and https://www.sciencedirect.com/science/article/abs/pii/S0031320307004359 for more info.

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4 changes: 2 additions & 2 deletions example-code/sc/BufNNDSVD.scd → example-code/sc/BufNMFSeed.scd
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Expand Up @@ -11,15 +11,15 @@ code::
//how many bases do I need to decompose the buffer while accounting for 90% of the variance?
(
Routine{
FluidBufNNDSVD.process(s, ~src, ~bases, ~activations, coverage: 0.9, method: 1).wait;
FluidBufNMFSeed.process(s, ~src, ~bases, ~activations, coverage: 0.9, method: 1).wait;
"% bases".format(~bases.numChannels).postln;
}.play;
)

//try the same process with less of the variance preserved
(
Routine{
FluidBufNNDSVD.process(s, ~src, ~bases, ~activations, coverage: 0.5).wait;
FluidBufNMFSeed.process(s, ~src, ~bases, ~activations, coverage: 0.5).wait;
"% bases".format(~bases.numChannels).postln;
}.play
)
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