Updates:
Status: Fixed
Comment #13 on issue 2049 by asmeurer: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
(No comment was entered for this change.)
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Comment #12 on issue 2049 by asmeurer: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
This has been pushed in.
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To po
Comment #11 on issue 2049 by smichr: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
https://github.com/sympy/sympy/pull/54
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Comment #10 on issue 2049 by smichr: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
rebased on master. I put in a pull request.
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Comment #9 on issue 2049 by asmeurer: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
Chris, what is the status of your branch for this?
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Comment #8 on issue 2049 by smichr: Derivative(f(x), x).subs(f(x), y) gives
0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
ok, it's back to it's pre-eval-True state of speed. See what you think,
Aaron.
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Comment #7 on issue 2049 by smichr: Derivative(f(x), x).subs(f(x), y) gives
0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
I will try that limitation.
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Comment #6 on issue 2049 by asmeurer: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
It will be the derivatives of f(x), up to the order of the ODE, so
expr.subs(f(x).diff(x, order), newterm.diff(x, order))
expr.subs
Comment #5 on issue 2049 by smichr: Derivative(f(x), x).subs(f(x), y) gives
0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
The selectively-doit approach that I take changes the run time from about
800 to 1400, the time mainly increasing in ode. This needs
Comment #4 on issue 2049 by smichr: Derivative(f(x), x).subs(f(x), y) gives
0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
I'm not sure which derivatives need targeting, so I cam using atoms to get
all derivatives, and substituting them with doit-derivati
Updates:
Labels: -EasyToFix
Comment #3 on issue 2049 by asmeurer: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
Applying this will fix it:
diff --git a/sympy/solvers/ode.py b/sympy/solvers/ode.py
index d6e35
Comment #2 on issue 2049 by smichr: Derivative(f(x), x).subs(f(x), y) gives
0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
in theory, yes :-) github.smichr/2049 has the changes made but there is a
failure in ode. Thinking it might be because a key which i
Updates:
Labels: EasyToFix Milestone-Release0.7.0
Comment #1 on issue 2049 by asmeurer: Derivative(f(x), x).subs(f(x), y)
gives 0 instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
Chris found that this was introduced by commit fc0254fd870f1ad2f, from
i
Issue 2049: Derivative(f(x), x).subs(f(x), y) gives 0 instead of
Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
This issue is now blocking issue 1986.
See http://code.google.com/p/sympy/issues/detail?id=1986
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Issue 2049: Derivative(f(x), x).subs(f(x), y) gives 0 instead of
Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
This issue is now blocking issue 1938.
See http://code.google.com/p/sympy/issues/detail?id=1938
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Status: Accepted
Owner: asmeurer
CC: smichr
Labels: Type-Defect Priority-Medium Matching
New issue 2049 by asmeurer: Derivative(f(x), x).subs(f(x), y) gives 0
instead of Derivative(y, x)
http://code.google.com/p/sympy/issues/detail?id=2049
Derivative is unevaluated, so there is no reason that
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