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EXAMPLES: a
custommade Matlab function

Even
though
Matlab has plenty of useful functions, in this example we're going to
develop a custommade
Matlab function. We'll have one input value and
two output values, to transform a given number in both Celsius and
Farenheit degrees.
A function file ('mfile') must begin
with a function definition line. In this line we define the name of the
function, the input
and the output
variables.

Type this example in the editor
window, and assign it the name 'temperature' ('File'
> 'New' > 'MFile'):
% This function is named 'temperature.m'.
% It has one input value 'x' and two outputs, 'c' and 'f'.
% If 'x' is a Celsius number, output variable 'f'
% contains its equivalent in Fahrenheit degrees.
% If 'x' is a Fahrenheit number, output variable 'c'
% contains its equivalent in Celsius degrees.
% Both results are given at once in the output vector [c f]
function [c f] = temperature(x)
f = 9*x/5 + 32;
c = (x  32) * 5/9;
Then, you can run the Matlab
function from the command window, like this:
>> [cent fahr] = temperature(32)
cent =
0
fahr =
89.6000
>> [c f]=temperature(41)
c =
40.5556
f =
41.8000
The receiving variables
([cent fahr] or [c f]) in the command window (or in another function or script that calls
'temperature') may have different names than those assigned within your
just created function.
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