search for: lnsrch

[sorry, forgot some details...] I'm using optim(param, fun, method='L-BFGS-B', lower=lo, upper=up) to minimize a certain function. Often the minimization ends with the message: ERROR: ABNORMAL_TERMINATION_IN_LNSRCH What is optim() trying to say? What have I to change in my function to make the minimization succeed? Do you think using BBoptim() instead of optim() changes anything? Thanks for your help! mario -- Ing. Mario Valle Data Analysis and Visualization Group | http://www.cscs.ch/~mva...

.../totupnum, totdownerr/totdownnum and add them both to my final error term. I'm constraining two of my parameters (to be between 0 and 1), and so it seems I have to use L-BFGS-B. Unfortunately, when optim gets close to the minimum, it usually bails with 52: "ERROR: ABNORMAL_TERMINATION_IN_LNSRCH" or sometimes 1: "NEW_X". Occasionally it succeeds. I assume this error is something to do with the error terms disappearing when you get reasonably good parameters. Is that plausible? If so does anybody know how to fix it? Thanks, Jon Phillips

...in.f: fdhess: bakslv: chlhsn: choldc: d1fcn: d2fcn: dfault: dogdrv: dogstp: forslv: fstocd: fstofd: grdchk: heschk: hookdr: hookst: hsnint: lltslv: lnsrch: mvmltl: mvmlts: mvmltu: optchk: optdrv: optif0: optif9: optstp: qraux1: qraux2: qrupdt: sclmul: secfac: secunf: sndofd: tregup: f77 -c zeroin.f -o zeroin.o zeroin.f:...

...== ** fstofd === End of Compilation 12 === ** grdchk === End of Compilation 13 === ** heschk === End of Compilation 14 === ** hookdr === End of Compilation 15 === ** hookst === End of Compilation 16 === ** hsnint === End of Compilation 17 === ** lltslv === End of Compilation 18 === ** lnsrch === End of Compilation 19 === ** mvmltl === End of Compilation 20 === ** mvmlts === End of Compilation 21 === ** mvmltu === End of Compilation 22 === ** optchk === End of Compilation 23 === ** optdrv === End of Compilation 24 === ** optif0 === End of Compilation 25 === ** optif9 ===...

...== ** fstofd === End of Compilation 12 === ** grdchk === End of Compilation 13 === ** heschk === End of Compilation 14 === ** hookdr === End of Compilation 15 === ** hookst === End of Compilation 16 === ** hsnint === End of Compilation 17 === ** lltslv === End of Compilation 18 === ** lnsrch === End of Compilation 19 === ** mvmltl === End of Compilation 20 === ** mvmlts === End of Compilation 21 === ** mvmltu === End of Compilation 22 === ** optchk === End of Compilation 23 === ** optdrv === End of Compilation 24 === ** optif0 === End of Compilation 25 === ** optif9 ===...