In probability, a combinatorial is the number of combinations (with replacement) of "r" objects in a set of "n" objects. Three input parameters, the function would appear as follows: exampleFunction(x,y,z)Įxample - A Function with Multiple Inputs To create such a function, simply provide variables for all of the required parameters. It's also possible to create a function that requires more than a single parameter. We can also assign the output of a function to a variable. (And that is 5 factorial, not that I'm really excited Below shows the result of calculating 5!. Here is how it would appear in the Freemat Editor window:įigure 32: The editor window with a short function writtenīecause the function has to be saved with the same filename as the function itself, the filename is fact.m. This function calculates the factorial value of theįunction return_value=fact(n) n=floor(n) return_value=gamma(n+1) However, it's straightforward to make your own. Here are some examples to help you understand.Įxample - A Function to Calculate the Factorial of a Numberįreemat does not have a built-in factorial function, typically denoted by the exclamation point (!). To use a function, enter the function name and any parameters it requires. For example, if you create a function called myFunc, it should be saved with the filename myFunc.m somewhere in your path. When you create a function, you need to give the filename for that function the same name as the function. Once it's completed, it returns any values needed and returns to wherever the function was called. If the function is called, Freemat goes through the function until it reaches the last line. Once your function is complete, just stop. Notice that a function does not finish with the end statement. Here's a general syntax for function thatĪccepts one input variable. This return value is set equal to the name of the function and any input variables it will accept. If it will return a value (or values), it should have a variable that will be used to return the value (or values). The function starts, literally enough, with the word function. It has the following syntax:įunction = function_name (parameter1, parameter2. You typically create a function for some action you routinely perform.Ī function is a script that starts with the word function and accepts one (or more) input values. The operation can be either to perform a series of calculations, provide an output, create a display, or combinations of these. This means that you can use the same variable names in a function as you've used outside of it. The difference between a script and a function is that the variables used in a script will be global the variables used within a function will be local. "myscript.m", in the Command Window, you'd type the following to execute the script: myscriptĪ function is a short script that performs an operation (FD, p. For example, if you created a file called m file, you can run it simply by typing the name of the file without typing the. Once you've created a script and saved it as a. This is a very easy way to run long scripts repeatedly. Then repeat running it from the Command Window. Thus, you can run a script, make any changes within the script you want, re-save the script, To redo a script, from the Command Window, use the up arrow to put the previous command onto the command line. From the Command Window, you can use the up and down arrows on your keyboard to cycle through these old commands. m extension) is stored in the history file. Remember: Do NOT type the ".m" after the name when you want to run the script from the command line!Ĭommand to run the script (which is simply the file name minus the.
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