clangs - norm, or the Frobenius-norm, or the infinity-norm, or the element with largest absolute value of a general real matrix A in sparse format.
#include <sunperf.h> float slangs(char *norm, SuperMatrix *A) double dlangs(char *norm, SuperMatrix *A) float clangs(char *norm, SuperMatrix *A) double zlangs(char *norm, SuperMatrix *A) float slangs_64(char *norm, SuperMatrix_64 *A) double dlangs_64(char *norm, SuperMatrix_64 *A) float clangs_64(char *norm, SuperMatrix_64 *A) double zlangs_64(char *norm, SuperMatrix_64 *A)
Oracle Solaris Studio Performance Library langs(3P) NAME langs: clangs, dlangs, slangs, zlangs - returns the value of the one- norm, or the Frobenius-norm, or the infinity-norm, or the element with largest absolute value of a general real matrix A in sparse format. SYNOPSIS #include <sunperf.h> float slangs(char *norm, SuperMatrix *A) double dlangs(char *norm, SuperMatrix *A) float clangs(char *norm, SuperMatrix *A) double zlangs(char *norm, SuperMatrix *A) float slangs_64(char *norm, SuperMatrix_64 *A) double dlangs_64(char *norm, SuperMatrix_64 *A) float clangs_64(char *norm, SuperMatrix_64 *A) double zlangs_64(char *norm, SuperMatrix_64 *A) PURPOSE langs returns the value of the one-norm, Frobenius-norm, the infinity- norm, or the element with largest absolute value of a general real matrix A in sparse format. langs returns the value norm = 'M' or 'm': max(abs(A(i,j))) norm = '1', 'O' or 'o': norm1(A) norm = 'I' or 'i': normI(A) norm = 'F', 'f', 'E' or 'e': normF(A) where norm1 denotes the one-norm of a matrix (maximum column sum), normI denotes the infinity-norm of a matrix (maximum row sum) and normF denotes the Frobenius-norm of a matrix (square root of sum of squares). Note that max(abs(A(i,j))) is not a matrix norm. ARGUMENTS char *norm (input) Specifies the value to be returned in langs as described above. SuperMatrix *A (input/output) A general matrix in sparse format with dimensions (A->nrow, A->ncol). SEE ALSO SuperMatrix http://crd.lbl.gov/~xiaoye/SuperLU/ James W. Demmel, Stanley C. Eisenstat, John R. Gilbert, Xiaoye S. Li and Joseph W. H. Liu, "A supernodal approach to sparse partial pivot- ing", SIAM J. Matrix Analysis and Applications, Vol. 20, Num. 3, 1999, pp. 720-755. 7 Nov 2015 langs(3P)