Check for the presence of a field, possibly nested, in a structure
bool = checkfields(s,varargin)
We often check for a field that is nested within other fields within a
structure. We have been doing this with a series of nested or grouped
isfield statements. This got annoying, so I wrote this routine as a
replacement. It extends the functionality of 'isfield'.
Suppose there is a structure, pixel.OP.pd.type; You can verify that the
sequence of nested structures is present via the call
checkfields(pixel,'OP','pd','type')
A return value of 1 means the field sequence is present,
A return value of 0 means the sequence is absent.
Copyright ImagEval Consultants, LLC, 2003.