Charles R Harris wrote: > On 10/31/07, Alan G Isaac <[EMAIL PROTECTED]> wrote: >>>>> 1.0**numpy.array([1,2,3]) >> array([ 1., 1., 1.]) >>>>> 1.0**numpy.mat([1,2,3]) >> Traceback (most recent call last): >> File "<stdin>", line 1, in <module> >> TypeError: unsupported operand type(s) for ** or pow(): 'float' and 'matrix' >> >> Why the restriction for matrices? > > Looks like it just got overlooked. It works fine for 2D arrays. > > In [11]: 1.0**eye(3) > Out[11]: > array([[ 1., 1., 1.], > [ 1., 1., 1.], > [ 1., 1., 1.]])
For ndarrays, it does elementwise exponentiation, so it is neither here nor there with respect to matrices. What is the definition of a scalar raised to a matrix power? I don't ever recall seeing one. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ Numpy-discussion mailing list [email protected] http://projects.scipy.org/mailman/listinfo/numpy-discussion
