c_point.c File Reference

Cluster library - Add point. More...

#include <grass/raster.h>
#include <grass/cluster.h>

Include dependency graph for c_point.c:

Go to the source code of this file.

Functions
int	I_cluster_point (struct Cluster *C, DCELL *x)
	Adds the point x to the list of data points to be "clustered". More...
int	I_cluster_begin_point_set (struct Cluster *C, int n)
	Begin point set. More...
int	I_cluster_point_part (struct Cluster *C, DCELL x, int band, int n)
	? More...
int	I_cluster_end_point_set (struct Cluster *C, int n)
	? More...

Detailed Description

Cluster library - Add point.

(C) 2001-2009 by 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.

Author

Original author CERL

Definition in file c_point.c.

Function Documentation

I_cluster_begin_point_set()

int I_cluster_begin_point_set	(	struct Cluster *	C,
		int	n
	)

Begin point set.

Parameters

C	pointer to Cluster structure
n	?

Returns

0 on success

-1 on error

Definition at line 71 of file c_point.c.

I_cluster_end_point_set()

int I_cluster_end_point_set	(	struct Cluster *	C,
		int	n
	)

?

Parameters

C	pointer to Cluster structure
n	?

Returns

number of points

Definition at line 109 of file c_point.c.

I_cluster_point()

int I_cluster_point	(	struct Cluster *	C,
		DCELL *	x
	)

Adds the point x to the list of data points to be "clustered".

The dimension of x must agree with the number of bands specified in the initializing call to I_cluster_begin()

Note: if all values in x are zero, the point is rejected

Returns

0 ok

-1 out of memory, point not added

1 all values are null, point not added

Definition at line 32 of file c_point.c.

References Cluster::nbands, Rast_is_d_null_value, and x.

I_cluster_point_part()

int I_cluster_point_part	(	struct Cluster *	C,
		DCELL	x,
		int	band,
		int	n
	)

?

Parameters

C	pointer to Cluster structure
x	cell value
band	band number
n	?

Returns

0 ok

-1 out of memory, point not added

1 all values are null, point not added

Definition at line 88 of file c_point.c.