GNU Octave Manual Version 3 by John W. Eaton, David Bateman, Søren Hauberg Paperback (6"x9"), 568 pages ISBN 095461206X RRP £24.95 ($39.95) |
6.1.3 Manipulating Structures
Other functions that can manipulate the fields of a structure are given below.
- Built-in Function: fieldnames (struct)
- Return a cell array of strings naming the elements of the structure
struct. It is an error to call
fieldnames
with an argument that is not a structure.
- Built-in Function: isfield (expr, name)
- Return true if the expression expr is a structure and it includes an element named name. The first argument must be a structure and the second must be a string.
- Function File: [v1, ...] = getfield (s, key, ...)
- Extract fields from a structure. For example
ss(1,2).fd(3).b=5; getfield (ss, {1,2}, "fd", {3}, "b") => ans = 5
Note that the function call in the previous example is equivalent to the expression
i1= {1,2}; i2= "fd"; i3= {3}; i4= "b"; ss(i1{:}).(i2)(i3{:}).(i4)
See also setfield, rmfield, isfield, isstruct, fieldnames, struct
- Function File: substruct (type, subs, ...)
- Create a subscript structure for use with
subsref
orsubsasgn
.See also subsref, subsasgn
ISBN 095461206X | GNU Octave Manual Version 3 | See the print edition |