Stephen Tetley wrote:
Hello Mike
A pitch class set represents Z12 numbers so I'd define a Z12 number
type then store it in a list (if you have need a multiset -
duplicates) or Data.Set (if you need uniqueness).
If you want an efficient implementation for *sets* of Z12 numbers I'd
recommend
Hello Mike
A pitch class set represents Z12 numbers so I'd define a Z12 number
type then store it in a list (if you have need a multiset -
duplicates) or Data.Set (if you need uniqueness).
Having a Z12 numeric type isn't the full story, some operations like
finding prime form have easier
On Sat, 14 Nov 2009, Michael Mossey wrote:
I'm pretty new to Haskell so I don't know what kind of data structure I
should use for the following problem. Some kind of arrays, I guess.
One data item, called OrientedPCSet (oriented pitch class set, a musical
term) will represent a set whose
Postscript...
Hi Mike
I rather overlooked your efficiency concerns, however I wouldn't be so
concerned. By the nature of what they represent I wouldn't expect
pitch classes to grow to a size where a bit representation out weighs
the convenience of a list or Data.Set.
By the same reason - I'd
2009/11/15 Henning Thielemann lemm...@henning-thielemann.de:
In Haskore there is a type for pitch classes:
http://hackage.haskell.org/packages/archive/haskore/0.1/doc/html/Haskore-Basic-Pitch.html
but maybe it is not what you need, since it distinguishes between C sharp
and D flat and so
Hi Stephen,
I will need a function that computes prime (normal?) form, of course, and
it is just begging to be memoized. I wonder if that is possible with
Data.Set, or whether it would be much faster using the bit vector
representation?
Thanks,
Mike
Stephen Tetley wrote:
Postscript...
Hi Mike
Try it and time it of course - there are a couple of libraries to help
memo-izing on Hackage. Never having used them, but looking at the docs
neither data-memocombinators or MemoTrie would seem to be
straightforward for Data.Set, so a Word32 or some other number that is
an instance of
On 15 Nov 2009, at 12:55, Stephen Tetley wrote:
http://hackage.haskell.org/packages/archive/haskore/0.1/doc/html/Haskore-Basic-Pitch.html
but maybe it is not what you need, since it distinguishes between
C sharp
and D flat and so on.
The enharmonic doublings and existing Ord instance
I'm pretty new to Haskell so I don't know what kind of data structure I
should use for the following problem. Some kind of arrays, I guess.
One data item, called OrientedPCSet (oriented pitch class set, a musical
term) will represent a set whose members are from the range of integers 0
to 11.
