LanDosG.c File Reference

#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <time.h>
#include <unistd.h>
#include "evsl.h"
#include "io.h"

Go to the source code of this file.

Macros
#define	max(a, b)   ((a) > (b) ? (a) : (b))
#define	min(a, b)   ((a) < (b) ? (a) : (b))

Functions
int	exDOS (double *vals, int n, int npts, double *x, double *y, double *intv)
int	read_coo_MM (const char *matfile, int idxin, int idxout, cooMat *Acoo)
int	get_matrix_info (FILE *fmat, io_t *pio)
int	findarg (const char *argname, ARG_TYPE type, void *val, int argc, char **argv)
int	readVec (const char *filename, int *npts, double **vec)
int	main (int argc, char *argv[])

Macro Definition Documentation

#define max	(		a,
			b
	)		((a) > (b) ? (a) : (b))

Definition at line 22 of file LanDosG.c.

#define min	(		a,
			b
	)		((a) < (b) ? (a) : (b))

Definition at line 23 of file LanDosG.c.

Function Documentation

int exDOS	(	double *	vals,
		int	n,
		int	npts,
		double *	x,
		double *	y,
		double *	intv
	)

Calculate the exact DOS given eigenvalues

Parameters

[in]	vals	eigenvalues
[in]	n	number of eigenvalues
[in]	npts	number of points for dos curve
[in]	intv	intervals of interests
[out]	x	coordinates for dos plot
[out]	y	y coordinates for dos plot

Note

Both x and y are expected to be preallocated.

Definition at line 22 of file exDOS.c.

References DSCAL(), linspace(), max, min, and PI.

Referenced by main().

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int findarg	(	const char *	argname,
		ARG_TYPE	type,
		void *	val,
		int	argc,
		char **	argv
	)

Definition at line 171 of file io.c.

Referenced by main().

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int get_matrix_info	(	FILE *	fmat,
		io_t *	pio
	)

Definition at line 22 of file io.c.

References _io_t::a, _io_t::b, ERR_IO, _io_t::Fmt, _io_t::Fname, _io_t::Fname1, _io_t::Fname2, _io_t::MatNam, _io_t::MatNam1, _io_t::MatNam2, MAX_LINE, MaxNamLen, MM0, MM1, and _io_t::n_intv.

Referenced by main().

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int main	(	int	argc,
		char *	argv[]
	)

---

Tests landosG.c , the Lanczos DOS computed for the generalized eigenvalue problem. Includes graphical comparison of calculated vs exact DOS

use -graph_exact_dos 1 to enable graphing the exact DOS

---

Definition at line 53 of file LanDosG.c.

References BSolPol(), cooMat_to_csrMat(), _BSolDataPol::deg, diagScalCsr(), evsl_timer(), EVSLFinish(), EVSLStart(), exDOS(), extrDiagCsr(), findarg(), _io_t::Fmt, _io_t::Fname1, _io_t::Fname2, free_coo(), free_csr(), FreeBSolPolData(), get_matrix_info(), HB, INT, LanDosG(), LanTrbounds(), _io_t::MatNam1, _io_t::MatNam2, MAX_LINE, _cooMat::nrows, rand_double(), read_coo_MM(), readVec(), SetAMatrix(), SetBMatrix(), SetBSol(), SetGenEig(), SetLTSol(), SetStdEig(), SetupPolRec(), and SetupPolSqrt().

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int read_coo_MM	(	const char *	matfile,
		int	idxin,
		int	idxout,
		cooMat *	Acoo
	)

Definition at line 66 of file io.c.

References _cooMat::ir, _cooMat::jc, MAX_LINE, mm_is_coordinate, mm_is_integer, mm_is_real, mm_is_sparse, mm_is_symmetric, mm_is_valid(), mm_read_banner(), mm_read_mtx_crd_size(), _cooMat::ncols, _cooMat::nnz, _cooMat::nrows, and _cooMat::vv.

Referenced by main().

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int readVec	(	const char *	filename,
		int *	npts,
		double **	vec
	)

Reads in a vector as an nx1 matrix.

Parameters

[out]	npts	pointer to an int to store # of points
[out]	vec	UNallocated space to read vector to
[in]	filename	file to read from, where the first line contains number of elements/width/height of matrix, and the rest of the lines contain the values.

Definition at line 32 of file LanDosG.c.

Referenced by main().

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