Re: [igraph] Getting started in igraph in C

[Gábor Csárdi]

On Sat, Mar 5, 2011 at 10:57 AM, Prithwiraj MUKHERJEE
<address@hidden> wrote:
> Hi Gabor
>
> Tanks for the reply. Personally I prefer working in R (as I use libraries
> apart from igraph also), so what you suggest seems ideal to me.
>
> I am familiar with coding in both languages, but know nothing about how they
> interact with the hardware, so pardon me if this question sounds silly. If I
> call bits of C code through R, do you mean those bits will will execute at
> the pace of a C program, i.e. faster?

A C program is a C program, it runs at the same speed, regardless
whether you call it from C or form R.

Best,
Gabor

> Best Regards
> Prithwiraj
>
> On Sat, Mar 5, 2011 at 4:39 PM, Gábor Csárdi <address@hidden> wrote:
>>
>> Hi Prithwiraj,
>>
>> there is no straightforward way to convert R code into C AFAIK. R is a
>> much higher level language, with language constructs that are not easy
>> to express in C, so this is not a trivial thing.
>>
>> I suggest that you identify the bottlenecks in your code, and then
>> rewrite only these in C, and keep the rest in R.
>> See the 'Writing R extensions' manual on the R homepage on how to call
>> C code from R.
>>
>> Best,
>> Gabor
>>
>> On Sat, Mar 5, 2011 at 10:00 AM, Prithwiraj MUKHERJEE
>> <address@hidden> wrote:
>> > Hello all
>> >
>> > I have been using igraph in R for a while now and have gotten used to
>> > it.
>> > However, for speed considerations I may reluctantly go back to using C.
>> >
>> > I have written a large amount of code in R already and would like to
>> > port it
>> > into C as painlessly as possible.
>> > I was wondering if there is a script or at least a general heuristic for
>> > converting R code to its C equivalent. I am sure there is some method to
>> > the
>> > naming conventions of igraph functions and their arguments.
>> >
>> > Best Regards
>> > Prithwiraj
>> >
>> > _______________________________________________
>> > igraph-help mailing list
>> > address@hidden
>> > http://lists.nongnu.org/mailman/listinfo/igraph-help
>> >
>> >
>>
>>
>>
>> --
>> Gabor Csardi <address@hidden>     UNIL DGM
>
>



-- 
Gabor Csardi <address@hidden>     UNIL DGM