On 11-07-19 7:48 AM, Matthew Dowle wrote:
"Prof Brian Ripley" wrote in message
news:alpine.lfd.2.02.1107190640280.28...@gannet.stats.ox.ac.uk...
On Mon, 18 Jul 2011, Alireza Mahani wrote:
Simon,
Thank you for elaborating on the limitations of R in handling float
types. I
think I'm pretty mu
On Jul 19, 2011, at 7:48 AM, Matthew Dowle wrote:
>
> "Prof Brian Ripley" wrote in message
> news:alpine.lfd.2.02.1107190640280.28...@gannet.stats.ox.ac.uk...
>> On Mon, 18 Jul 2011, Alireza Mahani wrote:
>>
>>> Simon,
>>>
>>> Thank you for elaborating on the limitations of R in handling flo
"Prof Brian Ripley" wrote in message
news:alpine.lfd.2.02.1107190640280.28...@gannet.stats.ox.ac.uk...
> On Mon, 18 Jul 2011, Alireza Mahani wrote:
>
>> Simon,
>>
>> Thank you for elaborating on the limitations of R in handling float
>> types. I
>> think I'm pretty much there with you.
>>
>> As
On Mon, 18 Jul 2011, Alireza Mahani wrote:
Simon,
Thank you for elaborating on the limitations of R in handling float types. I
think I'm pretty much there with you.
As for the insufficiency of single-precision math (and hence limitations of
GPU), my personal take so far has been that double-pr
Simon,
Thank you for elaborating on the limitations of R in handling float types. I
think I'm pretty much there with you.
As for the insufficiency of single-precision math (and hence limitations of
GPU), my personal take so far has been that double-precision becomes crucial
when some sort of erro
On Jul 18, 2011, at 6:15 PM, Alireza Mahani wrote:
> Duncan,
>
> Thank you for your reply. This is a rather unfortunate limitation, because
> for large data sizes there is a significant difference between the
> performance of '.C' and '.Call'.
I think you may have missed the main point - R do
Duncan,
Thank you for your reply. This is a rather unfortunate limitation, because
for large data sizes there is a significant difference between the
performance of '.C' and '.Call'. I will have to do some tests to see what
sort of penalty I incur for copying from double to float inside my C++ cod
On 18/07/2011 11:52 AM, Alireza Mahani wrote:
I am writing a wrapper function in C++ that calls a GPU kernel. My array type
for the GPU kernel is float, so I would like my wrapper function to receive
float arrays from R. I understand that I can use 'as.single' in R to copy a
double-precision vect
I am writing a wrapper function in C++ that calls a GPU kernel. My array type
for the GPU kernel is float, so I would like my wrapper function to receive
float arrays from R. I understand that I can use 'as.single' in R to copy a
double-precision vector from R in single-precision format while using
