About 'choose' function

On Mon, 08 Nov 2004 15:56:49 -0000 (GMT), (Ted Harding)
<Ted.Harding at nessie.mcc.ac.uk> wrote :

Further investigation indicates that there is an integer truncation
problem with 'choose':

 > print(choose(60000000000,1),digits=20)

 [1] 60001679906.00000

 > print(my.choose3(60000000000,1),digits=20)

 [1] 6e+10

Are you sure you're using the standard R choose()?  I get different
results from you:

print(choose(60000000000,1),digits=20)

[1] 6e+10

What platform are you using?  I did this is Windows R 2.0.0, and get
the same result in the beta of 2.0.1.

Well, that's good to learn! As usual, I'm out of date, but this
time it seems to matter:

  R-1.8.0 on Linux

(Yes, it was the standard R choose() from that version).

Perhaps I'd better roll up my sleeves and finally upgrade (though
I'm really waiting for the next release since the move to 2.0 seems
to have needed a few things ironed out).

Thanks for the cross-check, Duncan.
Best wishes,
Ted.


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Date: 08-Nov-04                                       Time: 19:10:55
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