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[linpy.git] / doc / linexpr.rst
1 Linear Expression Module
2 ========================
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4 This class implements linear expressions.
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6 .. py:class:: Expression
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9 .. py:method:: coefficient(self, symbol)
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11 Return the coefficient value of the given symbol.
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13 .. py:method:: coefficients(self)
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15 Return a list of the coefficients of an expression
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17 .. py:method:: constant(self)
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19 Return the constant value of an expression.
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21 .. py:method:: symbols(self)
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23 Return a list of symbols in an expression.
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25 .. py:method:: dimension(self)
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27 Return the number of vriables in an expression.
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29 .. py:method:: __sub__(self, other)
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31 Return the difference between two expressions.
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33 .. py:method:: subs(self, symbol, expression=None)
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35 Subsitute the given value into an expression and return the resulting expression.
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37 .. py:method:: fromsympy(self)
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39 Convert sympy object to an expression.
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41 .. py:method:: tosympy(self)
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43 Return an expression as a sympy object.
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45 .. py:class:: Symbol(Expression)
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48 .. py:class:: Dummy(Symbol)
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50 This class returns a dummy symbol to ensure that each no variables are repeated in an expression