Below is a listing of the input/output files which are accessed by the Lanczos program for computing singular vectors, LSVEC. Included also is a sample of the input file which LSVEC requires on file 5. The parameters in this file are supplied in free format. File 8 contains the data for the rectangular mxn matrix A. LSVEC computes singular vectors for each of a user-specified subset of the singular values computed by the companion program LSVAL. SAMPLE DEFINITIONS OF THE INPUT/OUTPUT FILES FOR LSVEC ------------------------------------------------------------------ *LSVEC EXEC TO RUN LANCZOS SINGULAR VECTOR PROGRAM FI 06 TERM FILEDEF 2 DISK &1 SVHISTOR A (RECFM F LRECL 80 BLOCK 80 FILEDEF 3 DISK &1 GOODSV A (RECFM F LRECL 80 BLOCK 80 FILEDEF 4 DISK &1 ERRINV A (RECFM F LRECL 80 BLOCK 80 FILEDEF 5 DISK LSVEC INPUT A (RECFM F LRECL 80 BLOCK 80 FILEDEF 8 DISK &1 INPUT A (RECFM F LRECL 80 BLOCK 80 FILEDEF 9 DISK &1 ERREST A (RECFM F LRECL 80 BLOCK 80 FILEDEF 10 DISK &1 BOUNDS A (RECFM F LRECL 80 BLOCK 80 FILEDEF 11 DISK &1 TEIGVECS A (RECFM F LRECL 80 BLOCK 80 FILEDEF 12 DISK &1 RITZVECS A (RECFM F LRECL 80 BLOCK 80 FILEDEF 13 DISK &1 PAIGE A (RECFM F LRECL 80 BLOCK 80 LOAD LSVEC LSSUB LSMULT --------------------------------------------------------------------- SAMPLE INPUT FILE FOR LSVEC --------------------------------------------------------------------- LSVEC SINGULAR VECTORS, NO REORTHOGONALIZATION BUT BIDIAGONALIZATION LINE 1 MATNO M N 100 100 80 LINE 2 MDIMTV MDIMRV MBETA (MAX.DIMENSIONS,TVEC,RITVEC AND BETA 10000 10000 2000 LINE 3 RELTOL .0000000001 LINE 4 MBOUND NTVCON SVTVEC IREAD (FLAGS 0 1 0 1 LINE 5 TVSTOP LVCONT ERCONT IWRITE (FLAGS 0 1 1 1 LINE 6 RHSEED (RANDOM GENERATOR SEED FOR STARTING VECTOR IN INVERM) 45329517 ------------------------------------------------------------------------