uBLAS element-wise power function

[matwey.kornilov@…]

I would like to introduce element-wise power function. There are four functions in the patch:

• pow( vector_expression, scalar )
• pow( matrix_expression, scalar )
• element_pow( vector_expression, vector_expression )
• element_pow( matrix_expression, matrix_expression )

Synopsis

These functions behave naturally. Let v is a vector, m is a matrix, p is a scalar then pow( v, p ) and pow( m, p ) just raise each element to the power p. element_pow( v1, v2) is v1[i] ^ v2[i]. element_pow( m1, m2) works similarly.

Rationalize

​http://ublas.sourceforge.net mentions "...elements wise basic functions (sin,cos,log,exp,abs,max,min,etc...)"

Patch

The patch contains implementation and also simple test routines.

[anonymous]

good idea