CppAD: A C++ Algorithmic Differentiation Package
20130918
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size_t CppAD::forward0sweep | ( | std::ostream & | s_out, |
bool | print, | ||
size_t | n, | ||
size_t | numvar, | ||
player< Base > * | play, | ||
size_t | J, | ||
Base * | taylor, | ||
bool * | cskip_op, | ||
pod_vector< addr_t > & | var_by_load_op | ||
) |
Compute zero order forward mode Taylor coefficients.
Base | The type used during the forward mode computations; i.e., the corresponding recording of operations used the type AD<Base>. |
s_out | Is the stream where output corresponding to PriOp operations will be written. |
If print is false, suppress the output that is otherwise generated by the c PriOp instructions. | |
n | is the number of independent variables on the tape. |
numvar | is the total number of variables on the tape. This is also equal to the number of rows in the matrix taylor; i.e., play->num_var_rec(). |
play | The information stored in play is a recording of the operations corresponding to the function
![]() ![]() The object play is effectly constant. The exception to this is that while palying back the tape the object play holds information about the current location with in the tape and this changes during palyback. |
J | Is the number of columns in the coefficient matrix taylor. This must be greater than or equal one. |
taylor | Input: For i = 1 , ... , n, taylor [i * J + 0] variable with index j on the tape (these are the independent variables). Output: For i = n + 1, ... , numvar - 1, taylor [i * J + 0] is the zero order Taylor coefficient for the variable with index i on the tape. |
cskip_op | Is a vector with size play->num_op_rec(). The input value of the elements does not matter. Upon return, if cskip_op[i] is true, the operator index i does not affect any of the dependent variable (given the value of the independent variables). |
var_by_load_op | Is a vector with size play->num_load_op_rec(). The input value of the elements does not matter. Upon return, it is the variable index corresponding the result for each load operator. In the case where the index is zero, the load operator results in a parameter (not a variable). Note that the is no variable with index zero on the tape. |
Definition at line 136 of file forward0sweep.hpp.
Referenced by CppAD::ADFun< Base >::ADFun(), and CppAD::ADFun< Base >::Forward().