Re: [Tutor] Need help with rewriting script to use Decimal module

At 06:32 PM 1/7/2007, Terry Carroll wrote: >I may add this algorithm to the cookbook. You should. Dick ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Need help with rewriting script to use Decimal module

On Sun, 7 Jan 2007, Terry Carroll wrote: > ...Say you want to get an approximation of 0.096. Well, a good first > approximation is 1/10. But 1/10 is 0.010 Um, that should be "...is 0.100" ___ Tutor maillist - Tutor@python.org http://mail.pytho

Re: [Tutor] Need help with rewriting script to use Decimal module

On Sat, 6 Jan 2007, Dick Moores wrote: > Well, I have to admit I don't understand your code at all. But I see it > works. A continuing fraction is an expression that looks like this: 1 A + -- 1 B +

Re: [Tutor] Need help with rewriting script to use Decimal module

At 10:40 AM 1/6/2007, Dick Moores wrote: >At 11:21 PM 1/4/2007, Terry Carroll wrote: > >On Wed, 3 Jan 2007, Dick Moores wrote: > > > > > Be that as it may, farey() is an amazing program. > > > >Not to beat this subject to death, but the comment at the bottom of > >http://aspn.activestate.com/ASPN/C

Re: [Tutor] Need help with rewriting script to use Decimal module

At 11:21 PM 1/4/2007, Terry Carroll wrote: >On Wed, 3 Jan 2007, Dick Moores wrote: > > > Be that as it may, farey() is an amazing program. > >Not to beat this subject to death, but the comment at the bottom of >http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52317 about >continued fractions

Re: [Tutor] Need help with rewriting script to use Decimal module

On Wed, 3 Jan 2007, Dick Moores wrote: > Be that as it may, farey() is an amazing program. Not to beat this subject to death, but the comment at the bottom of http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52317 about continued fractions piqued my interest. I'm no mathematician, but

Re: [Tutor] Need help with rewriting script to use Decimal module

At 08:20 AM 1/4/2007, Terry Carroll wrote: >On Wed, 3 Jan 2007, Dick Moores wrote: > > > Terry, I just noticed that farey(0.36, 10) returns (1, 3), a pretty > > big miss, IMO. The correct fraction with smallest error and maximum > > denominator of 10 is 3/8, which I'm proud to say my klunky frac.py

Re: [Tutor] Need help with rewriting script to use Decimal module

On Wed, 3 Jan 2007, Dick Moores wrote: > Terry, I just noticed that farey(0.36, 10) returns (1, 3), a pretty > big miss, IMO. The correct fraction with smallest error and maximum > denominator of 10 is 3/8, which I'm proud to say my klunky frac.py > (

Re: [Tutor] Need help with rewriting script to use Decimal module

At 01:17 PM 1/2/2007, Terry Carroll wrote: >On Mon, 1 Jan 2007, Dick Moores wrote: > > > bestFracForMinimumError() is only a small part of a program I wrote > > long ago, called frac.py > >Dick, if your goal is to have a routine to get the fraction with the least >possible error (as opposed to lear

Re: [Tutor] Need help with rewriting script to use Decimal module

>> Dick, if your goal is to have a routine to get the fraction with the least >> possible error (as opposed to learing how to use Decimal), have a look at >> this recipe from the Python Cookbook: >> >> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52317 > > Terry, that is truly ingenio

Re: [Tutor] Need help with rewriting script to use Decimal module

On Wed, 3 Jan 2007, Dick Moores wrote: > At 01:17 PM 1/2/2007, Terry Carroll wrote: > > > http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52317 > > Terry, that is truly ingenious. Is there an explication anywhere of > exactly how it works? There is in the printed copy of the Python Coo

Re: [Tutor] Need help with rewriting script to use Decimal module

At 01:17 PM 1/2/2007, Terry Carroll wrote: >On Mon, 1 Jan 2007, Dick Moores wrote: > > > bestFracForMinimumError() is only a small part of a program I wrote > > long ago, called frac.py > >Dick, if your goal is to have a routine to get the fraction with the least >possible error (as opposed to lear

Re: [Tutor] Need help with rewriting script to use Decimal module

At 10:39 AM 1/2/2007, Kent Johnson wrote: >Dick Moores wrote: >>from decimal import Decimal as D >>def bestFracForMinimumError(decimal, minimumError): >> denom = 0 >> while True: >> denom += 1 >> num = round(D(str(decimal)) * D(str(denom))) >> error = abs(str((s

Re: [Tutor] Need help with rewriting script to use Decimal module

On Tue, 2 Jan 2007, Terry Carroll wrote: > Dick, if your goal is to have a routine to get the fraction with the least > possible error (as opposed to learing how to use Decimal), have a look at > this recipe from the Python Cookbook: > > http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/

Re: [Tutor] Need help with rewriting script to use Decimal module

On Mon, 1 Jan 2007, Dick Moores wrote: > bestFracForMinimumError() is only a small part of a program I wrote > long ago, called frac.py Dick, if your goal is to have a routine to get the fraction with the least possible error (as opposed to learing how to use Decimal), have a look at this rec

Re: [Tutor] Need help with rewriting script to use Decimal module

Dick Moores wrote: > from decimal import Decimal as D > > def bestFracForMinimumError(decimal, minimumError): > denom = 0 > while True: > denom += 1 > num = round(D(str(decimal)) * D(str(denom))) > error = abs(str((str(D(num) / D(str(denom))) - This looks back

Re: [Tutor] Need help with rewriting script to use Decimal module

from decimal import Decimal as D def bestFracForMinimumError(decimal, minimumError): denom = 0 while True: denom += 1 num = round(D(str(decimal)) * D(str(denom))) error = abs(str((str(D(num) / D(str(denom))) - D(str(decimal))) / str(D(str(decimal)) * d("100"))

Re: [Tutor] Need help with rewriting script to use Decimal module

At 05:37 AM 1/1/2007, Kent Johnson wrote: >Dick Moores wrote: >>bestFracForMinimumError() is only a small part of a program I wrote >>long ago, called frac.py >>(). I'm trying to >>rewrite it so as to get more precision by using the Decimal module, >>

Re: [Tutor] Need help with rewriting script to use Decimal module

Dick Moores wrote: > bestFracForMinimumError() is only a small part of a program I wrote > long ago, called frac.py > (). I'm trying to rewrite > it so as to get more precision by using the Decimal module, but am > getting nowhere. Errors all over the

[Tutor] Need help with rewriting script to use Decimal module

bestFracForMinimumError() is only a small part of a program I wrote long ago, called frac.py (). I'm trying to rewrite it so as to get more precision by using the Decimal module, but am getting nowhere. Errors all over the place. Can some kind and kn