Call Local Functions Using Function Handles - MATLAB & Simulink (original) (raw)

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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.

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 = piab; end

Invoke the function to get a struct of handles to the local functions.

h =

struct with fields:

       focus: @computeFocus
eccentricity: @computeEccentricity
        area: @computeArea

Call a local function using its handle to compute the area of an ellipse.

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.

Call Local Functions Using Function Handles - MATLAB & Simulink (original) (raw)

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