prn3lb.f File Reference

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Functions/Subroutines
subroutine	prn3lb (n, x, f, task, iprint, info, itfile, iter, nfgv, nintol, nskip, nact, sbgnrm, time, nseg, word, iback, stp, xstep, k, cachyt, sbtime, lnscht)
	This subroutine prints out information when either a built-in convergence test is satisfied or when an error message is generated. More...

Function/Subroutine Documentation

prn3lb()

subroutine prn3lb	(	integer	n,
		double precision, dimension(n)	x,
		double precision	f,
		character*60	task,
		integer	iprint,
		integer	info,
		integer	itfile,
		integer	iter,
		integer	nfgv,
		integer	nintol,
		integer	nskip,
		integer	nact,
		double precision	sbgnrm,
		double precision	time,
		integer	nseg,
		character*3	word,
		integer	iback,
		double precision	stp,
		double precision	xstep,
		integer	k,
		double precision	cachyt,
		double precision	sbtime,
		double precision	lnscht
	)

This subroutine prints out information when either a built-in convergence test is satisfied or when an error message is generated.

Parameters

n	On entry n is the number of variables. On exit n is unchanged.
x	On entry x is an approximation to the solution. On exit x is the current approximation.
f	On first entry f is unspecified. On final exit f is the value of the function at x.
task	working string indicating the current job when entering and leaving this subroutine.
iprint	Console output flag; same convention as in setulb. Negative suppresses all output. >=0 prints the per-run summary. >=1 also writes to iterate.dat. >=100 also prints the final x vector.
info	Termination status. 0 on normal convergence. Negative values map to specific error messages: -1, -2 (Cholesky not pos.def. in formk's 1st/2nd factor), -3 (formt's Cholesky), -4 (non-descent direction caught by lnsrlb), -5 (>10 evals in a line search), -6 (invalid nbd(k)), -7 (l(k) > u(k)), -8 (singular triangular system), -9 (>20 evals in the last line search).
itfile	unit number of iterate.dat file
iter	Total number of outer iterations.
nfgv	Total number of f/g evaluations across the run.
nintol	Total number of breakpoint segments traversed by cauchy.
nskip	Number of L-BFGS updates that were skipped because the curvature condition failed (s'y too small).
nact	Number of active bounds at the final generalised Cauchy point.
sbgnrm	Final infinity norm of the projected gradient at x.
time	Total wall-clock time of the optimisation run, in seconds.
nseg	Number of breakpoint segments traversed at the LAST cauchy call (used in the iterate.dat record on abnormal exits).
word	3-character status code from prn2lb: 'con', 'bnd', 'TNT', or '—' (see prn2lb.f). Logged in iterate.dat on info=-4 or info=-9 termination.
iback	Number of backtracks in the LAST line search.
stp	Final step length from the LAST line search.
xstep	stp * ||d|| from the LAST line search (i.e. the actual step length in x-space).
k	Index of the offending parameter when info is -6 (invalid nbd) or -7 (infeasible bound). Set by errclb.
cachyt	Cumulative wall-clock time spent in cauchy, in seconds.
sbtime	Cumulative wall-clock time spent in subsm, in seconds.
lnscht	Cumulative wall-clock time spent in lnsrlb, in seconds.

Definition at line 56 of file prn3lb.f.

Referenced by mainlb().

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