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Re: st: Mata buffered read 64-bit integer (8 byte/int64), how?


From   Stas Kolenikov <skolenik@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Mata buffered read 64-bit integer (8 byte/int64), how?
Date   Thu, 13 Jun 2013 15:48:04 -0500

You can probably define the -struct-ure that could store such strings,
and convert them into numbers for arithmetic operations. Bill Gould
may have had an article on this in Stata Journal -- the generic use of
structures is described in
http://www.stata-journal.com/sjpdf.html?articlenum=pr0035. Coding
matrix multiplication with these elements will quickly become an
overkill :-\.

-- Stas Kolenikov, PhD, PStat (SSC)
-- Senior Survey Statistician, Abt SRBI
-- Opinions stated in this email are mine only, and do not reflect the
position of my employer
-- http://stas.kolenikov.name



On Thu, Jun 13, 2013 at 3:12 PM, Sergiy Radyakin <serjradyakin@gmail.com> wrote:
> I read a 32-bit integer value from a buffered file with d=fbufget(C,fh,"%4bu").
>
> How do I read a 64-bit integer from the same file when Mata does not
> support format "%8bu"? And what can be the type of the LHS (type of
> variable d above) to accommodate the result of the read without the
> loss of information (double is not good, not sure about quad
> precision).
>
> I can read it as 8-bytes string, or 8 individual bytes, but I also
> need to work with the result as a value in Mata. So looking for a
> convenient solution.
>
> Thank you,
>      Sergiy
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