Simply, I don't understand the use of the ~ symbol in a specific case.

I understand that ~ is the NOT operation but I was running someone else's script on an older version of MATLAB (2008b) and the function fails because it makes the following call:

[~, x] = function(...)

It works on the 2012 distribution. I however am simply confused as to what this [~, x] means. What is the "~" doing?

Thank you.

Answer 1

[Frederik]

The ~ is used as a placeholder for unused arguments. Take a look here: http://blogs.mathworks.com/steve/2010/01/11/about-the-unused-argument-syntax-in-r2009b/