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Please go through the subfunction page (or local function as MATLAB calls it) in its entirety before watching the following tutorial video. 

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Your main_function file should look like this. 

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The last paragraph of the Local Functions documentation page says that "All functions, including local functions, have their own workspace that are separate from the base workspace.  Local functions cannot access variables used by other functions unless you pass them as arguments" and vice-versa. The following video covers this very important concept. 

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That brings us to the end of this tour. Before we part, let's remind ourselves of some important programming guidelines that we have followed in this tour:

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