linesearch_func – nlesolver-fortran

interface
private subroutine linesearch_func(me, xold, p, x, f, fvec, fjac, fjac_sparse)

Type	Intent	Optional	Attributes		Name
class(nlesolver_type),	intent(inout)			::	me
real(kind=wp),	intent(in),		dimension(me%n)	::	xold	previous value of `x`
real(kind=wp),	intent(in),		dimension(me%n)	::	p	search direction
real(kind=wp),	intent(out),		dimension(me%n)	::	x	new `x`
real(kind=wp),	intent(inout)			::	f	input: current magnitude of `fvec`, output: new value of `f`
real(kind=wp),	intent(inout),		dimension(me%m)	::	fvec	input: current function vector, output: new function vector
real(kind=wp),	intent(in),	optional,	dimension(:,:)	::	fjac	jacobian matrix [dense]
real(kind=wp),	intent(in),	optional,	dimension(:)	::	fjac_sparse	jacobian matrix [sparse]

line search method. Note that not all inputs/outputs are used by all methods.