Comment #2 on issue 2212 by ronan.l...@gmail.com: Matrix([Matrix, …])
should work
http://code.google.com/p/sympy/issues/detail?id=2212
Nice! With your patch, Matrix(...) is able to stack its arguments
vertically. This raises interesting additional points:
* it should be possible to stack things horizontally as well
* this feels like too much complexity for a constructor
So, building upon your patch, I think that Matrix should get 2 more
constructors (i.e. classmethods returning instances of Matrix):
Matrix.hstack and Matrix.vstack. These can be implemented very simply for
now:
@classmethod
def vstack(cls, *args):
return Matrix(args)
@classmethod
def hstack(cls, *args):
transpose = lambda arg: arg.transpose() if isinstance(arg, Matrix) else
arg
return Matrix(map(transpose, args)).transpose()
but ultimately, the actual logic for the operations should be transferred
from Matrix.__init__. The new class methods will also deprecate .col_join()
and .row_join().
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