See
http://docs.python.org/ref/integers.html.
Python is a bit odd in this respect: It's used mostly as a scripting
language, so why does it have this feature, while most data analysis languages
don't...
Andy
From
my c++ days I was under the impression that even an unsigned long integer has
a maximum, somewhere around 4,294,967,295.
--Matt
Perhaps it would be nice if Insightful can implement something
like what the latest version of Python has: automatically extend to `long
integer' when needed. `Long integer' in Python has no upper
limit.
Andy
Steve,
You are battling something you can't win. The threshold value
which can cause undetected overflow errors is > 2^(b-1)-1 where b is 32
for 32-bit systems. The largest value you can reliably represent as
an integer is 2,147,483,647. You can verify this with by looking at
> .Machine$integer.max
[1] 2147483647
The number of 2,147,483,648 could (would?) overflow and could go
back to -1.
A decent intro reference for these kind of issues is Numerical
Issues in Statistical Computing for the Social Scientist by Altman, Gill
and McDonald.
--Matt
Dear All,
I am using SPLUS Professional Edition
Version 6.0.3 Release 2 for Microsoft Windows XP.
I found that if I do:
>1000000*1500000
# I get:
[1]
NA
A workaround is to do:
>1000000.0*1500000.0
[1]
1.5e+012
Is there a way I can correct for the above bug
without putting decimal places?
Thank you for your attention.
PS. No luck in getting SPLUS 6.1 in my university yet, as they
are out of licence!
Steve.
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