yeah, my patch only works for rational numbers. will have a look at the article / method you posted, claude.
On Fri, Dec 16, 2011 at 7:49 PM, Claude Heiland-Allen <[email protected]>wrote: > On 16/12/11 06:51, i go bananas wrote: > >> by the way, here is the method i used: >> >> first, convert the decimal part to a fraction in the form of n/100000 >> next, find the highest common factor of n and 100000 >> (using the 'division method' like this: >> http://easycalculation.com/**what-is-hcf.php<http://easycalculation.com/what-is-hcf.php>) >> >> then just divide n and 100000 by that factor. >> > > I don't think that method will give happy results for most simple > fractions. Plus it's useful to get approximations that are simpler or more > accurate, like 3 or 22/7 or 355/113 for pi.. > > Your patch doesn't work very well for me: > > input: 1/7 > fraction: 2857/20000 > input: 8/9 > fraction: 11111/12500 > input: 7/11 > fraction: 15909/25000 > input: 11/17 > fraction: 4313.67/6666.67 > > (input is "$1 $2"--[/], so as accurate as floating point is...) > > > actually, that means it's accurate to 6 decimal places, i guess. >> > > There's a way to get a "simple" fraction like 1/7 instead of 143/1000 or > whatever, could be possible to implement in Pd? (I've not tried.) > > [0] http://hackage.haskell.org/**packages/archive/base/latest/** > doc/html/src/Data-Ratio.html#**approxRational<http://hackage.haskell.org/packages/archive/base/latest/doc/html/src/Data-Ratio.html#approxRational> > > [1] http://en.wikipedia.org/wiki/**Continued_fraction#Best_** > rational_approximations<http://en.wikipedia.org/wiki/Continued_fraction#Best_rational_approximations> > > well...whatever :D >> > > > Claude > > > ______________________________**_________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> http://lists.puredata.info/** > listinfo/pd-list <http://lists.puredata.info/listinfo/pd-list> >
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