[Rcpp-devel] Error with sugar dnorm;

[Romain Francois]

Le 24/11/10 19:38, Andrew Redd a écrit :
> I'm having a problem with sugar expressions that I can't figure out.
> I have these two functions that are sampling and prior functions for
> two different parameters of an MCMC model.  BTW this is part of my big
> CUDA project, so I pass these as pointers into other functions.
> ---
> numeric rb1(numeric a, numeric b){return Rcpp::rbeta(1,a,b)[0];}
> numeric pr_trans(numeric x){return Rcpp::dnorm(x,0.0, 1024.0)[0];}
> ---
> the first works fine but the second gives a compile error that
>> error: no matching function for call to ‘dnorm4(numeric&, double, double)’
>
> numeric is typedef double.   I don't see why this fails.  Any ideas?
>
> thanks,
> Andrew

The first argument of dnorm is a numeric sugar expression (for example 
NumericVector).

Try this :

numeric pr_trans(numeric x){return dnorm( NumericVector::create(x) 
,0.0, 1024.0)[0];}

Romain

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Romain Francois
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