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In the above example, there are three functions: the main function is called "newsstats". Within this function, there are two subfunctions; one called "mean" and the other, "median". The subfunction is defined the exact same way as the main function; but the difference is the subfunction can only used when the main function is used - you can not call your subfunctions in the command window. As you can see, the main function calls both of the subfunctions, making the code much shorter and simpler. For longer, more complex code, this can save you a lot of debugging time by breaking down your code into smaller pieces.
Open up beam_5. We will use the subfunction concept to incorporate the function bending_stress into one m file.

We are going to designate beam_5.m as a function. So at the top of the code, include the following code:

function main_function
%the main function

Click save as - and name the file "main_function" - the same as the function's name. Now, open up bending_stress.m and copy the entire code. Paste it below the main function. Close both functions with an "end" What you have now should look like this:

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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