Re: [eigen] How can I improve this function

[Gael Guennebaud <gael.guennebaud@xxxxxxxxx>]

 you could try:

x = (x.array()>0).select(xval, (y.array()>0).select(yval, x) );

but that won't be faster.

gael


On Sat, Sep 22, 2012 at 1:54 AM, Hung Dang <hungptit@xxxxxxxxx> wrote:
> Hi all,
>
> I have below function and I would like to improve it using Eigen's way. Any
> suggestion?
>
> Thanks a lot
> Hung
>
>   template<typename T>
>   void combine(Eigen::Matrix<T, Eigen::Dynamic, 1> & x, const T xval,
>            const Eigen::Matrix<T, Eigen::Dynamic, 1> & y, const T yval) {
>     const size_t len = x.rows();
>     for (size_t idx = 0; idx < len; idx ++) {
>       if (x(idx,0) > 0) {
>     x(idx,0) = xval;
>       } else {
>     if (y(idx,0) > 0) x(idx,0) = yval;
>       }
>     }
>   }
>
>
>