Is there a way to extend Cwise to use my own binary function? Let's say, I want to apply element wise my own binary function with the following signature

Code: Select all

double f(double, double);

to two matrices of doubles? I could always do it using a nested loop, but I want the whole thing to be vectorized.
Regards,
renorm.

Yes, you can use:
http://eigen.tuxfamily.org/dox/classEig ... d88f6af1ad

However, if you want the resulting code to be vectorized, you'll have to provide some extra information in your functor, especially the packetOp() method. See e.g. Core/Functors.h for some examples e.g. ei_scalar_sum_op.

Thanks. That was very helpful.

Another tiny question. Static factory methods Zeros(), Ones() etc of fixed size matrix don't require any arguments, because the sizes are known. Won't it be an error to supply arguments to those methods? I am using Eigne in generic code and the type of matrix can be both fixed and dynamic.

It won't be an error. It will just assert() that your arguments are the correct values. The reason is exactly your use case.

That makes perfect sense. Thanks again.