[R] speed issue in simulating a stochastic process
r.turner at auckland.ac.nz
Fri Nov 7 01:17:13 CET 2014
> On Thu, Nov 6, 2014 at 2:05 PM, Matteo Richiardi <matteo.richiardi at gmail.com
>> Final question: in your code you have mean(M[t-1L,]): what is the 'L'
>> for? I removed it at apparently the code produces the same output...
The constant "1L" is stored as an integer; the constant "1" is stored as
double precision. This sometimes makes no difference and sometimes
makes a huge difference (especially in the context of numerical
comparisons). If something is supposed to be an integer it is safer to
use the "L" form.
Technical Editor ANZJS
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