MATLAB: Function [output]=FunctionName(input)

bracketsfunction

I don't understand why sometimes a pair of brackets is used when a function is created. I have seen it in two cases:

1. the output is empty 2. the output is logical

Can someone please help me to clarify the scope of using a pair of brackets for the output when a function is created?

Best Answer

Go to Create Functions in Files and look for Syntax for Function Definition. It says:

Output arguments (optional)

If your function returns one output, you can specify the output name after the function keyword. [...] If your function returns more than one output, enclose the output names in square brackets.

function [one,two,three] = myFunction(x)

The brackets are optional with zero and one output.

The Matlab template includes the brackets

function [ output_args ] = Untitled( input_args )
    %UNTITLED Summary of this function goes here
    %   Detailed explanation goes here
end

I guess, this template encourage the use of brackets with zero and one output.

Related Solutions

MATLAB: [] appears after a function

According to the function documentation, those square brackets contain any output arguments. Because the square brackets you show in your question contain zero variables, that function has zero output arguments.

function [A,B,C,D] = myfun(...) % 4 output arguments
function [A,B,C] = myfun(...)   % 3 output arguments
function [A,B] = myfun(...)     % 2 output arguments
function [A] = myfun(...)       % 1 output arguments
function [] = myfun(...)        % 0 output arguments

For one or zero output arguments the square brackets can be omiited entirely:

function A = myfun(...)        % 1 output arguments
function myfun(...)            % 0 output arguments

MATLAB: A problem with a function

Try this out:

input_args = [-0.9133 0.3481];
output_args = zeros(size(input_args));
for k=1:length(input_args)
    if input_args(k)<0
             output_args(k)=round(2^16+input_args(k)*2^15);
    else
             output_args(k)=round(input_args(k)*2^15);
    end
end

Best Answer

Related Solutions

MATLAB: [] appears after a function

MATLAB: A problem with a function

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