The Complete SPRLIB & ANNLIB

SAMMON-VARIABLES: - some global variables for the Sammon mapping routines (LOCAL)

`double`	`set`**	A copy of the samples of the original set; `num_samples` vectors of length `set_dim.` The vectors start from index 0.
`double`	`map`**	The map vectors; `num_samples` vectors of length `map_dim.` The vectors start from index 0.
`double`	`backup`**	A backup of the map vectors, used during the minimization.
`double`	`set_distance`**	The distances in the set; a triangular matrix. Each row `s` contains `num_samples` - `s` distances to other samples.
`double`	`constant`	The constant used in Sammon's mapping: 1 over the sum of all distances in `set.`
`long`	`num_samples`	The number of samples in `set` and `map.`
`long`	`set_dim`	The dimension of each sample in `set.`
`long`	`map_dim`	The dimension of each sample in `map.`
`int`	`initialized`	A boolean indicating whether or not `sammon_init` was called.
`DATASET`	*`original_set`**	A pointer to the original dataset. Necessary for the `sammon_extract_map` function.

All these variables are for internal use by the Sammon mapping functions only.

`SAMMON-VARIABLES`