from sympy import MatrixSymbol, ImmutableMatrix
u = MatrixSymbol('u', 2,1)
print "\n\ntest1:"
print u.subs(u, ImmutableMatrix([3,5]))[0,0]
print "\n\ntest2:"
print u[0,0].subs(u, ImmutableMatrix([3,5]))
print "\n\ntest3:"
print u[0,0].subs(u, ImmutableMatrix([3,5])).evalf()
Here is whet this code prints:
test1:
3
test2:
Matrix([
[3],
[5]])[0, 0]
test3:
Matrix([
[3],
[5]])[0, 0]
I expected the same output in all tests. At least in the 3rd test the
result should be 3.
Why this expresion is not evaluated? How to evaluate it?
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