point2d_parallel.c File Reference

#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <grass/gis.h>
#include <grass/vector.h>
#include <grass/dbmi.h>
#include <grass/interpf.h>

Include dependency graph for point2d_parallel.c:

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Functions
int	IL_check_at_points_2d_cvdev (struct interp_params *params, struct quaddata *data, double *b, double *ertot, double zmin, double dnorm, struct triple *target_point)
	A parallel version of IL_check_at_points_2d. Sperate the cross-validation/deviation computing part and the database writing part.

Detailed Description

Author

Lubos Mitas (original program and various modifications)

C.Y. Liang, H. Mitasova, I. Kosinovsky, D. Gerdes, D. McCauley (GRASS4.1 version of the program and GRASS4.2 modifications)

modified by Liang in May 2024

modified by McCauley in August 1995

modified by Mitasova in August 1995, Nov. 1996

Copyright

(C) 1993-2006 by Helena Mitasova and the GRASS Development Team

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Definition in file point2d_parallel.c.

Function Documentation

IL_check_at_points_2d_cvdev()

int IL_check_at_points_2d_cvdev	(	struct interp_params *	params,
		struct quaddata *	data,
		double *	b,
		double *	ertot,
		double	zmin,
		double	dnorm,
		struct triple *	target_point
	)

A parallel version of IL_check_at_points_2d. Sperate the cross-validation/deviation computing part and the database writing part.

Parameters

params	interpolation parameters
data	data in the segment for computing, NULL for writing out
b	solution of linear equations for computing, NULL for writing out
ertot	total error for computing, point at single point for writing out
zmin	min z-value for computing
dnorm	normalization factor for computing
target_point	point for computing or writing out

Returns

1

Todo:

Alternative description: ...calculate the maximum and RMS deviation caused by smoothing.

Parameters

data	current region
b	solution of linear equations
ertot	total error
zmin	min z-value

Definition at line 60 of file point2d_parallel.c.

References b, interp_params::cv, err(), interp_params::fi, IL_write_point_2d(), interp_params::interp, quaddata::n_points, NULL, quaddata::points, r, triple::x, quaddata::x_orig, interp_params::x_orig, triple::y, quaddata::y_orig, and interp_params::y_orig.