This example shows how to create handles to local functions. If a function returns handles to local functions, you can call the local functions outside of the main function. This approach allows you to have multiple, callable functions in a single file.
Create the following function in a file,
ellipseVals.m, in your working folder. The function returns a struct with handles to the local functions.
% Copyright 2015 The MathWorks, Inc. function fh = ellipseVals fh.focus = @computeFocus; fh.eccentricity = @computeEccentricity; fh.area = @computeArea; end function f = computeFocus(a,b) f = sqrt(a^2-b^2); end function e = computeEccentricity(a,b) f = computeFocus(a,b); e = f/a; end function ae = computeArea(a,b) ae = pi*a*b; end
Invoke the function to get a
struct of handles to the local functions.
h = ellipseVals
h = struct with fields: focus: @computeFocus eccentricity: @computeEccentricity area: @computeArea
Call a local function using its handle to compute the area of an ellipse.
ans = 9.4248
Alternatively, you can use the
localfunctions function to create a cell array of function handles from all local functions automatically. This approach is convenient if you expect to add, remove, or modify names of the local functions.