MATLAB Function Reference

fieldnames

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Field names of structure, or public fields of object

Syntax

names = fieldnames(s)
names = fieldnames(obj)
names = fieldnames(obj, '-full')

Description

names = fieldnames(s) returns a cell array of strings containing the structure field names associated with the structure s.

names = fieldnames(obj) returns a cell array of strings containing the names of the public data fields associated with obj, which is a MATLAB, COM, or Java object.

names = fieldnames(obj, '-full') returns a cell array of strings containing the name, type, attributes, and inheritance of each field associated with obj, which is a MATLAB, COM, or Java object.

Examples

Given the structure

mystr(1,1).name = 'alice';
mystr(1,1).ID = 0;
mystr(2,1).name = 'gertrude';
mystr(2,1).ID = 1

the command n = fieldnames(mystr) yields

n = 
    'name'
    'ID'

In another example, if f is an object of Java class java.awt.Frame, the command fieldnames(f) lists the properties of f.

f = java.awt.Frame;

fieldnames(f)
ans = 
    'WIDTH'
    'HEIGHT'
    'PROPERTIES'
    'SOMEBITS'
    'FRAMEBITS'
    'ALLBITS'
        .
        .

See Also

setfield, getfield, isfield, orderfields, rmfield, Using Dynamic Field Names

fgets (serial)

figure

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