[GiNaC-devel] Find length of a vector

[Jan Rheinländer]

Hi,

trying to find the length of a vector by taking the square root of the 
scalar product, I get this (in ginsh):

> v = [[a,b]];
[[a,b]]
 > r = sqrt(v * transpose(v));
sqrt([[a,b]]*[[a],[b]])
 > evalm(r);
matrix::pow(): don't know how to handle exponent

The reason is that the scalar product evaluates to a matrix with a 
single element, not to a numeric. Is that intended?

Thanks,

Jan Rheinländer

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