ParameterExpression

class ParameterExpression(symbol_map, expr)

Bases: object

ParameterExpression class to enable creating expressions of Parameters.

Create a new ParameterExpression.

Not intended to be called directly, but to be instantiated via operations on other Parameter or ParameterExpression objects.

Parameters

• symbol_map (Dict[Parameter, [ParameterExpression, float, or int]]) – Mapping of Parameter instances to the sympy.Symbol serving as their placeholder in expr.

• expr (sympy.Expr) – Expression of sympy.Symbol s.

Methods

arccos	Arccos of a ParameterExpression
arcsin	Arcsin of a ParameterExpression
arctan	Arctan of a ParameterExpression
assign	Assign one parameter to a value, which can either be numeric or another parameter expression.
bind	Binds the provided set of parameters to their corresponding values.
conjugate	Return the conjugate.
cos	Cosine of a ParameterExpression
exp	Exponential of a ParameterExpression
gradient	Get the derivative of a parameter expression w.r.t.
is_real	Return whether the expression is real
log	Logarithm of a ParameterExpression
sin	Sine of a ParameterExpression
subs	Returns a new Expression with replacement Parameters.
tan	Tangent of a ParameterExpression

Attributes

parameters

Returns a set of the unbound Parameters in the expression.

Return type

Set