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Re: st: RE: RE: estimate precision in MATA
From
Stas Kolenikov <[email protected]>
To
[email protected]
Subject
Re: st: RE: RE: estimate precision in MATA
Date
Wed, 22 Sep 2010 08:08:31 -0500
On Wed, Sep 22, 2010 at 2:25 AM, Marie-Claire Robitaille-Blanchet
<[email protected]> wrote:
> Let say I want to sum two variables. I can use format to increase the number of digits after the decimal point for the new variable = old_variable_1 + old_variable_2.
>
> I'm looking for the equivalent but when I sum matrixes in MATA. So I want to increase the number of digit after the decimal point for the new matrix I'm creating from already existing matrixes. And, if possible, I would prefer the entry in the new matrix to be in the data type: double.
Mata already operates in double precision. If you need even higher
precision for your computations, there are -quad*()- functions
available. For each individual number, you can -printf()- it in the
format you like:
. mata
: pi()
3.141592654
: printf("%20.18f",pi())
3.141592653589793100
Here, of course, the trailing zeroes are wrong, but Stata may have no
way of figuring out that they are.
--
Stas Kolenikov, also found at http://stas.kolenikov.name
Small print: I use this email account for mailing lists only.
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