A pointer to the DATASET from which the map has to be built.
int
dim
The dimension of the Sammon map.
RETURNS
TRUE in case an error occured, FALSE otherwise.
FUNCTION
This function allocates and fills a number of global arrays (set,map,set_distance) and sets a number of global variables (constant,num_samples,set_dim,map_dim,initialized and original_set) - see
SAMMON-VARIABLES. In fact, a local copy of the DATASET is made and
distances are pre-calculated to speed subsequent processing in
sammon_solve. Also, the global initialized variable is set to TRUE.
NOTE
A pointer to the DATASETset is saved in the global variable original_set
for use in the sammon_extract_map function. This means that set
must not be changed or deleted between calling this function and
sammon_extract_map.
This function has to be called before any other Sammon mapping routine.
The function sammon_exit has to be called to free the allocated
memory.
