[Rcpp-devel] Fwd: How can I avoid calls to coerceToReal

[Romain Francois]

What is the type of df[i] ?

i.e. what does it says:

SEXP tmp = df[i] ;
Rprintf( "TYPEOF(tmp)=%d", TYPEOF(tmp) ) ;

If this is anything but REALSXP (i.e. 14), then you have to coerce the 
data to bne able to use it as a NumericVector.

Romain

Le 30/04/13 17:19, Pratibha Rana a écrit :
> Hi,
>
> MY application is performing really slow due to unnecessary calls to
> coerceToReal from this line NumericVector ocol = df[j]. Here is a sample
> of what I am doing. Is there a way to avoid the unnecessary overhead?
> Please note that the data in df is float data.
>
>
>            void  writeDataToPartitionWriter(DataFrame df, Writer
> &res_writer)
>            {
>
>                  NumericVector ocol = df[j];
>                  if(ocol[i] ==NA_REAL)
>                      res_writer.setFloat(j, vfloat_null);
>                  else
>                  {
>                      vfloat floatout = static_cast<vfloat>(ocol[i]);
>                      res_writer.setFloat(j, floatout);
>                  }
>
>            }
>
>
> Thanks
> Pratibha


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