Peter
Your proposal appears to work better than expected:
On a 64-bit machine, it reported
64 when R64 was launched
32 when R62 was launched
On a 32-bit machine, it reported 32.
The underlying issue for me is that I am calling c code — I want to make sure
that I don’t call 64-bit c code when I am using 32-bit R (either in Windows 32-
or 64-bit).
Dennis
Dennis Fisher MD
P < (The "P Less Than" Company)
Phone: 1-866-PLessThan (1-866-753-7784)
Fax: 1-866-PLessThan (1-866-753-7784)
www.PLessThan.com
On Apr 10, 2014, at 1:23 PM, peter dalgaard <[email protected]> wrote:
> I believe that b. is .Machine$sizeof.pointer*8.
>
> I am not aware of a method to figure out the difficult part of a.: whether a
> 32 bit R is running on 64 bit Windows. I'd expect that you have to ask the OS
> somehow. Google coughs up one or two interesting pointers.
>
> -pd
>
> On 10 Apr 2014, at 21:48 , Fisher Dennis <[email protected]> wrote:
>
>> 3.0.2
>> Windows
>>
>> Colleagues,
>>
>> If I am setting up code for others and I don’t know their configuration,
>> what is the simplest way to find out the following within R:
>> a. is the system 32- or 64-bit?
>> b. if the system is 64-bit, is R 32- or 64-bit?
>>
>> Dennis
>>
>> Dennis Fisher MD
>> P < (The "P Less Than" Company)
>> Phone: 1-866-PLessThan (1-866-753-7784)
>> Fax: 1-866-PLessThan (1-866-753-7784)
>> www.PLessThan.com
>>
>>
>>
>>
>> [[alternative HTML version deleted]]
>>
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Email: [email protected] Priv: [email protected]
>
>
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