A comma-separated list of axis array component names may also be supplied to this routine. In this case the result returned will be the lowest precision numeric type to which all the specified axis arrays can be converted without unnecessary loss of information.
A value of zero may be supplied for the IAXIS argument, in which case the routine will combine the
results for all the NDF
’s axes in the same way as described above.
The symbolic constant NDF__SZTYP may be used for declaring the length of a character variable which is to hold the numeric type of an NDF axis array. This constant is defined in the include file NDF_PAR.