94 lines
2.8 KiB
Plaintext
94 lines
2.8 KiB
Plaintext
* Soustraction de Polynômes!!!!
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* (solved) Expression importe mal 4x^2
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In [9]: e = Expression("3x + 4x^2 - 1")
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In [10]: print(e)
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3 x + ( 4 x ) ^ 2 - 1
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-> faire un test unitaire dessus
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*(solved) Render ne met pas les parenthèses là où il faut.
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In [31]: r
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Out[31]: < Polynom [-4, -15, -14]>
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In [35]: print(r)
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-14 * x ^ 2 + -15 x + ( -4 )
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In [36]: r.get_postfix()
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Out[36]: [-14, 'x', 2, '^', '*', -15, 'x', '*', '+', -4, '+']
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In [37]: txt(r.get_postfix())
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Out[37]: '-14 * x ^ 2 + -15 x + ( -4 )'
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-> faire un test unitaire dessus
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*(solved) Fraction ne simplifie pas correctement
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In [5]: for i in P.alpha.simplify():
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print(i)
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...:
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\frac{ - 2 }{ 2 \times 3 }
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\frac{ -2 }{ 6 }
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\frac{ ( -1 ) \times 2 }{ 3 \times 2 }
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\frac{ -1 }{ 3 }
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\frac{ -2 }{ 6 }
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* Opération entre une expression et une fraction ou un Polynom
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In [3]: P = Polynom([1,2,1])
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In [4]: e = Expression("1+2*3")
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In [5]: e + P
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Out[5]: < <class 'pymath.expression.Expression'> [1, 2, 3, '*', '+', < Polynom [1, 2, 1]>, '+'] >
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In [6]: P + e
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---------------------------------------------------------------------------
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TypeError Traceback (most recent call last)
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<ipython-input-6-ff312ef36cdb> in <module>()
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----> 1 P + e
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/home/lafrite/scripts/pyMath/pymath/polynom.py in __add__(self, other)
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430 [< <class 'pymath.expression.Expression'> [3, 'x', 2, '^', '*', 2, 'x', '*', '+', 1, '+', 5, 'x', '*', 4, '+', '+'] >, < Polynom [< <class 'pymath.expression.Expression'> [1, 4, '+'] >, < <class 'pymath.expression.Expression'> [2, 5, '+'] >, 3]>, < Polynom [< <class 'pymath.expression.Expression'> [1, 4, '+'] >, < <class 'pymath.expression.Expression'> [2, 5, '+'] >, 3]>]
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431 """
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--> 432 o_poly = self.conv2poly(other)
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433
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434 n_coef = spe_zip(self._coef, o_poly._coef)
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/home/lafrite/scripts/pyMath/pymath/polynom.py in conv2poly(self, other)
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319 return other
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320 else:
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--> 321 raise ValueError(type(other) + " can't be converted into a polynom")
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322
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323 def reduce(self):
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TypeError: unsupported operand type(s) for +: 'type' and 'str'
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* (solved) Parenthèses abhérentes
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In [7]: P = Polynom([-6, 12, -20])
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In [8]: print(P)
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( - 20 x^{ 2 } + 12 x ) - 6
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* Chainer des opérations et sauvegarde des étapes
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In [12]: R = P-Q - P
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In [13]: R
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Out[13]: < Polynom [-4, -5, 0]>
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In [14]: for i in R.explain():
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print(i)
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....:
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3 x^{ 2 } - 3 x - 3 - ( 3 x^{ 2 } + 2 x + 1 )
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3 x^{ 2 } - 3 x - 3 - 3 x^{ 2 } - 2 x - 1
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( 3 - 3 ) x^{ 2 } + ( -3 - 2 ) x - 3 - 1
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- 5 x - 4
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