Nested-function handles stored inside structures

compute_modes.m

function [modes] = compute_modes(Nmode,z,desc)
% COMPUTE_MODES example function to demonstrate nested-function handles
% John Boyle, April 2015
for jj = 1:Nmode
    data(jj,:) = sin(2*pi*jj * z);
end

    function plot_modes()
        figure
        for ii = 1:Nmode
            subplot(Nmode,1,ii)
            plot(z,data(ii,:))
            if ii == 1; title(['Mode from ' desc]); end
        end
        
    end

modes.data = data;
modes.Nmode = Nmode;
modes.z = z;
modes.desc = desc;
modes.plot = @plot_modes;
end

test_nested_function_handles.m

% Using nested-function handles to simplify calling utility functions
% John Boyle, April 2015
z = linspace(0,1,200);

m1 = compute_modes(2,z,'Type 1');
m2 = compute_modes(5,z, 'Type 2');
m3 = compute_modes(8,z, 'Type 3');

% These function handles save the function namespace.
% The memory use won't show up in the variable size
m1.plot()
m2.plot()
m3.plot()

% Variable size without handle
% 5524
% 10324
% 18324

% Variable size with handle
% 5732
% 10532
% 18532