Hi,
I m trying to fix this issue.
I want to be able to index matrices with an iterator. E.g.
In [1]: X = Matrix(3, 3, range(9))
In [2]: X
Out[2]:
⎡0 1 2⎤
⎢ ⎥
⎢3 4 5⎥
⎢ ⎥
⎣6 7 8⎦
In [3]: X[[0,2], :]
⎡0 1 2⎤
⎢ ⎥
⎣6 7 8⎦
I suppose the relevant function are
sympy/matrices/dense.py:DenseMatrix.__getitem__()
and
sympy/matrices/sparse.py:SparseMatrix.__getitem__()
*Is this already solved or it need to be solved as the requirement. That is
Will user be able to index the matrix iteratively with the following expression?
*
X[[0,2], :]
*Currently if gives an error
*Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/dist-packages/sympy/matrices/matrices.py", line 243,
in __getitem__
return self.submatrix(key)
File "/usr/lib/python2.7/dist-packages/sympy/matrices/matrices.py", line 951,
in submatrix
rlo, rhi = self.slice2bounds(keys[0], self.rows)
File "/usr/lib/python2.7/dist-packages/sympy/matrices/matrices.py", line
1014, in slice2bounds
raise IndexError("Improper index type")
IndexError: Improper index type
Thank you,
Malintha
*
*
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