Description of set_large

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set_large

PURPOSE

set_large(n) --- set the cut off size for large graphs.

SYNOPSIS

function sz = set_large(n)

DESCRIPTION

 set_large(n) --- set the cut off size for large graphs. 
 set_large --- with no arguments, this returns the current threhold
 between "small" and "large".

 At construction, graphs on n or fewer vertices are considered "small" and
 are given full storage; otherwise, the graphs are "large" and given
 sparse storage.

CROSS-REFERENCE INFORMATION

This function calls:

• graph_system_exists graph_system_exists checks to see if the GRAPH_MAGIC global structure has

This function is called by:

• graph_init graph_init(capacity) --- used to initialize the GRAPH_MAGIC data

SOURCE CODE

0001 function sz = set_large(n)
0002 % set_large(n) --- set the cut off size for large graphs.
0003 % set_large --- with no arguments, this returns the current threhold
0004 % between "small" and "large".
0005 %
0006 % At construction, graphs on n or fewer vertices are considered "small" and
0007 % are given full storage; otherwise, the graphs are "large" and given
0008 % sparse storage.
0009 
0010 if ~graph_system_exists
0011     error('Graph system not initialized')
0012 end
0013 
0014 global GRAPH_MAGIC
0015 
0016 if nargin==0
0017     sz = GRAPH_MAGIC.large_size;
0018     return
0019 end
0020 
0021 if (n<1)
0022     n = 1000;
0023 end
0024 
0025 GRAPH_MAGIC.large_size = n;
0026 sz = n;

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