>>>>> "TH" == Ted Harding <ted.hard...@manchester.ac.uk>
>>>>> on Sun, 03 May 2009 10:11:04 +0100 (BST) writes:
TH> On 02-May-09 17:34:15, bogdanno wrote:
>> It seems division with numbers bigger than 10 000 000
>> doesn't work 20000000/21 [1] 952381
>>> 55555555/23
>> [1] 2415459
>>
>> Thank you
TH> I think you are confusing what is displayed with what is
TH> computed:
TH> 20000000/21 # [1] 952381 print(20000000/21,17) # [1]
TH> 952380.9523809524
TH> 55555555/23 # [1] 2415459 print(55555555/23,17) # [1]
TH> 2415458.913043478
TH> (20000000/21)*21 # [1] 2e+07
TH> print((20000000/21)*21,17) # [1] 2e+07
TH> (55555555/23)*23 # [1] 55555555
TH> print((55555555/23)*23,17) # [1] 55555555
TH> Your "numbers bigger than 10 000 000" corresponds to the
TH> default display of results to 7 significant figures.
TH> If (as in the above print() statements) you increase
TH> this, you get more "reasonable"-looking results.
Yes, indeed.
If Bogdanno thinks he wants to always see "all" digits, he
should use something like
options(digits= 20)
in his R startup setting, e.g. in his Rprofile, see ?Startup.
Note however:
Quite a few experienced R users rather do *REDUCE* the default number
of digits printed, rather than enlarge them.
(I don't)
Martin Maechler, ETH Zurich
TH> --------------------------------------------------------------------
TH> E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk>
TH> Fax-to-email: +44 (0)870 094 0861 Date: 03-May-09 Time:
TH> 10:11:02 ------------------------------ XFMail
TH> ------------------------------
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