Tzvika Barenholz wrote:
There are multiple (conflicting) definitions
for vector*vector in various contexts, the most common is
(a1, a2, ...)*(b1, b2, ...)=(a1*b1, a2*b2, ...)
...
I mean exactly the above indicated 'common one'. of course i could
relate to it as a multiplication of two matrices (the left a row the
right a column) but seems a bit ugly.
You'll get a 1x1 matrix in this case, i.e. you geft the scalar
product of two vectors: a1*b1+a2*b2+...
Do you think there is a point in adding a sort of static methods class
, VectorUtils or the like?
I never felt the need to do this. In Java 1.3 even with HotSpot,
there is still a noticable speed advantage if you unroll and
inline simple vector operations in inner loops instead of calling
a function.
Does anybody have more recent data about Java performance
for numerical comuptations?
J.Pietschmann
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