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# Re: st: Identifying unique values with codebook

 From wgould@stata.com (William Gould, StataCorp LP) To statalist@hsphsun2.harvard.edu Subject Re: st: Identifying unique values with codebook Date Thu, 17 Jun 2010 10:03:17 -0500

```In the last paragraph of my posting on preicision yesterday, I wrote

>   For -double-, 52 binary digits are assigned to the significand,
>   and thus the largest integer-valued double not subject to rounding
>   is (2^52)-1 =  4,503,599,627,370,495, which means 15.65 digits.

For -double-, 52 binary digits are assigned to the significand,
and thus the largest integer-valued double not subject to rounding
is (2^53)-1 =  9,007,199,254,740,991, which means 15.95 digits.
^^      ^^^^^^^^^^^^^^^^^^^^^^              ^^^^^

-- Bill
wgould@stata.com
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