MATLAB Responds to Greeting

MATLAB replies back when you type "hi" into the command window, with eleven possible responses.

Description

Typing the word "hi" in the command window will trigger MATLAB to randomly select one of eleven possible text responses to your greeting. Some are friendly, others are not.

This file is meant to have some fun with MATLAB. You may modify the program to make more possible responses, change the text responses, and so on. I was inspired to make this file when I found out about MATLAB's internal file called "why." Type that word into your command window for some strange philosophy.

• MATLAB release: MATLAB 7.1.0 (R14SP3)

[Matt Fig]

Looking at the code I have some suggestions.

Do you really need the vector M? (No)
Why not put all your responses into a 12x1 cell then index into the cell array instead of nesting so many if else statements? Or you could use a switchyard.
Why is your function named cold_chat but saved as hi?