How to define a function in the command window?

I'm trying to define the function

t=1:1/8000:5
x(n)=sin(2*pi*t(n))

I've tried function x(n)=sin(2*pi*t(n)) like you would do in the editor but it doesn't work. What's the correct sintax?

Answer 1

[Walter Roberson]

At the command window, you can use

x = @(n) sin(2*pi*t(n));

This will create the function named "x" that takes a single parameter, n.

Note that this function will not be available within other functions unless it is passed as a parameter to the other function: its definition will be local to the scope it is in.

[Yongkai liu]

Thanks! works!

Answer 2

[Jan]

Functions can be defined in M-files only. In addition these M-files must be functions itself, so scripts are not allowed. And an M-file is a function, if it starts with the term "function".

Reading the Getting Started chapters of the documentation is obligatory, when you want to use such a powerful tool as Matlab.

[Allen]

Which part of the numerous Getting Started chapters may that be?

Be more specific... use SEER - State, Elaborate, Eample, Reiterate. Provide links or clearly indicate where to look. We all have to learn at one point in time.

[Jan Kappen]

lol, this is 12 years old and has changed.

Functions can now be defined almost anywhere in scripts and function files. See Types of Functions - MATLAB & Simulink (mathworks.com)

Answer 3

[Wayne King]

   t=1:1/8000:5; 
   x =sin(2*pi*t);

Have you tried to read the MATLAB documentation?