Hello.
In my program I am having to do this:
PartDerivs [ - ( n + 1 ) : ] = PartDerivs [ - ( n + 1 ) : ] . subs ( {
Ep ( 0 ) : 0, De ( n ) : 0 } )
but this fails saying:
AttributeError: 'list' object has no attribute 'subs'
There is a curious behaviour of Matrix w.r.t slicing:
In [1]: from sympy import Matrix
...: M=Matrix(2,3,[1,2,3,4,5,6])
...: print(type(M[0:2,0:2]))
...:
<class 'sympy.matrices.matrices.MutableMatrix'>
In [2]: V=Matrix([1,2,3])
...: print(type(V[2:]))
...:
<class 'list'>
Due to the above behaviour I am not able to do subs() on a slice of a
Vector matrix. What remedy can you good people provide? (This might
even be considered a bug.)
Thanks.
--
Shriramana Sharma
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