This is probably a bug. The code you provided should work as expected. In general the connection between MatrixExprs and scalar Exprs is rough.
On Mon, Jan 13, 2014 at 2:42 AM, Dee Mee <[email protected]> wrote: > 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? > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
