文件列表:

lsqrDataModule.f90 (890, 2007-10-24)
lsqrblas.f90 (7028, 2007-10-24)
lsqrblasInterface.f90 (1256, 2008-12-20)
lsqrCheckModule.f90 (10855, 2008-12-20)
lsqrModule.f90 (31423, 2008-12-20)
lsqrTestModule.f90 (12823, 2008-12-20)
lsqrTestProgram.f90 (1743, 2007-10-24)
LSQR.txt (95706, 2008-12-20)
Makefile (1018, 2008-12-20)

README for lsqrf90-v2 The software for LSQR (f90 version 2) is provided by SOL, Stanford University under the terms of the OSI Common Public License (CPL): http://www.opensource.org/licenses/cpl1.0.php 24 Sep 2007: Version 2 of f90 files for LSQR. Separate modules are used for LSQR, example test problems, and Check routines for A and x. LSQR lives in lsqrModule.f90. Aprod1, Aprod2 (matrix-vector product routines) are in lsqrTestModule.f90. This module illustrates how problem-specific data can be created for Aprod1, Aprod2 even though LSQR calls them with a simple parameter list. 24 Sep 2007: f90 files available for download from SOL. 19 Dec 2008: lsqrblasInterface module implemented. Maintained by Michael Saunders, SOL, Stanford University saunders@stanford.edu 650-723-1875 ----------------------------------------------------------------------------- LSQR (f90 version 2) involves the following files: lsqrblas.f90 (not needed if Level 1 BLAS are available) lsqrblasInterface.f90 lsqrCheckModule.f90 lsqrModule.f90 lsqrTestModule.f90 lsqrTestProgram.f90 LSQR.txt (example output file from an Intel Xeon system compiled with g95 -r8 -O -g on Linux Redhat 9) Makefile To compile the code and run the test program on Linux or Unix, proceed as follows: Make (creates executable TestProgram) ./TestProgram grep appears LSQR.txt "LSQR appears to be successful" should occur 18 times. "LSQR appears to have failed" might occur for the most ill-conditioned problem, but this is not cause for alarm if ||A'r|| is very small (~= 1e-12).

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