Return Nx5 array of node and direction characters.
x=id(t)
The ID utility function converts a coordinate trace t into an nx5 matrix of coordinate identifiers suitable for row sorting and set operations like SETDIFF, etc. The first column of the output matrix is the node number, and columns 2 through 5 are ASCII codes of the direction field.
>> t=imat_ctrace('5y', '6rx', '3z', '4x-')
t =
'5Y+'
'6RX+'
'3Z+'
'4X-'
>> id(t)
ans =
5 89 43 32 32
6 82 88 43 32
3 90 43 32 32
4 88 45 32 32
>>
imat_ctrace/node, imat_ctrace/dir, imat_ctrace/cellstr, imat_ctrace/char, imat_ctrace/double