[Octave-bug-tracker] [bug #53111] [octave forge] (symbolic): does not simplify results the same as matlab

[Mike Miller]

Update of bug #53111 (project octave):

                 Summary: Symbolic does not simplify results the same as
matlab => [octave forge] (symbolic): does not simplify results the same as
matlab

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Follow-up Comment #1:

I don't think it's a compatibility issue if SymPy doesn't expand or combine
factors in exactly the same way as Matlab. But I think Colin can speak to this
better.

Btw, try


>> simplify (x_d_a)
ans = (sym)

    ⎛   2              2    2              2⎞
  c⋅⎝- X  + 2⋅X⋅X₀ - X₀  - Y  + 2⋅Y⋅Y₀ - Y₀ ⎠
 
───────────────────────────────────────────
                                         2   
     ((X - X₀)⋅sin(a) + (-Y + Y₀)⋅cos(a))    




This is a little more compact and closer to the Matlab result you have cited.

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