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| bool | is_uninitialized () |
| | Return true if this variable has been declared, but not been defined. More...
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| | var () |
| | Construct a variable for later assignment. More...
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| | var (vari *vi) |
| | Construct a variable from a pointer to a variable implementation. More...
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| | var (float x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (double x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument as a value and a zero adjoint. More...
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| | var (long double x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (bool x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (char x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (short x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (int x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (long x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (unsigned char x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (unsigned short x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (unsigned int x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| | var (unsigned long x) |
| | Construct a variable from the specified arithmetic argument by constructing a new vari with the argument cast to double, and a zero adjoint. More...
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| double | val () const |
| | Return the value of this variable. More...
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| double | adj () const |
| | Return the derivative of the root expression with respect to this expression. More...
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| void | grad (std::vector< var > &x, std::vector< double > &g) |
| | Compute the gradient of this (dependent) variable with respect to the specified vector of (independent) variables, assigning the specified vector to the gradient. More...
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| void | grad () |
| | Compute the gradient of this (dependent) variable with respect to all (independent) variables. More...
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| vari & | operator* () |
| | Return a reference to underlying implementation of this variable. More...
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| vari * | operator-> () |
| | Return a pointer to the underlying implementation of this variable. More...
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| var & | operator+= (const var &b) |
| | The compound add/assignment operator for variables (C++). More...
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| var & | operator+= (const double b) |
| | The compound add/assignment operator for scalars (C++). More...
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| var & | operator-= (const var &b) |
| | The compound subtract/assignment operator for variables (C++). More...
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| var & | operator-= (const double b) |
| | The compound subtract/assignment operator for scalars (C++). More...
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| var & | operator*= (const var &b) |
| | The compound multiply/assignment operator for variables (C++). More...
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| var & | operator*= (const double b) |
| | The compound multiply/assignment operator for scalars (C++). More...
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| var & | operator/= (const var &b) |
| | The compound divide/assignment operator for variables (C++). More...
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| var & | operator/= (const double b) |
| | The compound divide/assignment operator for scalars (C++). More...
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Independent (input) and dependent (output) variables for gradients.
This class acts as a smart pointer, with resources managed by an agenda-based memory manager scoped to a single gradient calculation.
An var is constructed with a double and used like any other scalar. Arithmetical functions like negation, addition, and subtraction, as well as a range of mathematical functions like exponentiation and powers are overridden to operate on var values objects.
Definition at line 31 of file var.hpp.
| vari& stan::math::var::operator* |
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Return a reference to underlying implementation of this variable.
If x is of type var, then applying this operator, *x, has the same behavior as *(x.vi_).
Warning: The returned reference does not track changes to this variable.
- Returns
- variable
Definition at line 293 of file var.hpp.
| vari* stan::math::var::operator-> |
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inline |
Return a pointer to the underlying implementation of this variable.
If x is of type var, then applying this operator, x->, behaves the same way as x.vi_->.
Warning: The returned result does not track changes to this variable.
Definition at line 307 of file var.hpp.