00000nam 2200000zi 4500 9.949282 CaOODSP 20250319135455 m o d f cr mn||||||||| 250319e198507##bcca obf f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre Fs97-6/1384E-PDF Fs97-6/1384E Mittertreiner, Anthony, author. SIMPLEX : a manual and software package for easy nonlinear parameter estimation and interpretation in fishery research / by Anthony Mittertreiner and Jon Schnute. Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, July 1985. ©1985 1 online resource (xi, 90 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 0706-6457 ; no. 1384 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (page 82). "This manual describes a method for (1) fitting models in which parameters enter nonlinearly and (2) interpreting the results of the analysis to assess model validity. The manual also documents the software package SIMPLEX, a tool which easily allows the user to obtain optimal parameter estimates, produce various plots of model predictions and likelihoods, and calculate parameter covariances. SIMPLEX is particularly convenient to use when the objective function (i.e., criterion of model fit) can be expressed as a sum of similar terms, as is the case, for example, with a least squares fit. More generally, SIMPLEX can also be adapted to applications in which the objective function is analytically more complex. Typically, the user need provide only a brief section of FORTRAN code to describe the desired model; once this is done, all SIMPLEX features are immediately available for model fitting and interpretation. The manual not only documents the SIMPLEX software, but also presents the complete theory underlying its development and use. This includes descriptions of (1) the simplex search method of function minimization, (2) the utility of various plots in assessing model fit, and (3) the numerical calculation of parameter covariances, standard deviations, and correlations. Suggestions are provided for operating the search algorithm efficiently and applying it in non-standard situations"--Abstract, page viii. Includes abstracts in English and French. Fisheries Statistics Computer programs Handbooks, manuals, etc. Fisheries Statistics Data processing Handbooks, manuals, etc. Pêches Statistiques Logiciels Guides, manuels, etc. Pêches Statistiques Informatique Guides, manuels, etc. Handbooks and manuals lcgft Guides et manuels rvmgf Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian technical report of fisheries and aquatic sciences ; no. 1384. (CaOODSP)9.504449 PDF 1.00 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1384-eng.pdf