the meaning of "[~," in a matrix

Hi

my friend send to me a code that I don`t understand a line of it. The line is:

[~ , x_opt] = min(g); % g is the cost function vector

my question is that what is the meaning of "[~," in a matrix?

thanks

Answer 1

[Star Strider]

The tilde ‘~’ in a function output tells MATLAB to not import that output in the calling function workspace. The min function can produce two outputs, the minimum (the first output) and the index of the first instance of the minimum value for the second. In the code you quoted, whoever wrote it was only interested in the index.

[hamid]

Thanks Dear.

[Star Strider]

My pleasure.

[Allan]

Can you simplify '~' pleaase

Im just starting out in MATLAB

[Star Strider]

@Allan — See the documentation section on: not, ~.

[Allan]

Thank You Mr.Star Strider (you are a goat)

[Star Strider]

My pleasure!