how to write functions in an m-file?

If I define a function like

function (cost) = objective (time)

cost = some non linear equation in time

It shows error in line-1 input argument that is at '(time)'. Please help me how to write a function?

Also, if my function depends on two variables say t1 and t2, how to define it? I've tried using

function (cost) = objective (t1 t2)

and also tried this:

time = [t1 t2]
function (cost) = objective (time)

But it shows error.

[Gopalakrishnan venkatesan]

function[cost]=objective(time)

if number of input arguments are two

then

function[cost]=objective(t1,t2)

[learner]

Thanks GopalKrishnan, but it's typo in my question. earlier I've tried

function [ f ] = fun1(x)
x=[2 3 4]

And it worked fine for me but in other file, I've written:

function [ cost ] = objective( time )
time=[t1 T]

Also I tried

function [ cost ] = objective( t1 T )

Or

function [ cost ] = objective( t )
t=[t1 T]

But every time it showed an error. I am unable to identify, what went wrong.

Please help.

[Walter Roberson]

Please copy the entire text of the error message.

Answer 1

[chef13]

You should write something like that:

function [ cost ] = objective( time )
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here
% Here you put what your function does
end

I hope it helps you.

Answer 2

[Ellison Castro]

I think it should be constructed like this:

function[output1, output2, ...] = function_name(input1, input2, ...)
% Insert your main code here using your inputs and returning outputs.
end;

You should also remove this line of code if you're using it at the beginning.

clear; clc; clf;

The first line of the m-file must be the function syntax. To call the function, create another m-file using this syntax:

[variable1, variable2, ...] = function_name(value1, value2, ...)

Your number of inputs should be equal to your specified inputs on your function's m-file.

[chef13]

Don't put the semicolomn after the end , it is not needed.

Answer 3

[Image Analyst]

time is a built-in function. Use another name for it, like myTimes.