Use of this symbol [~]

Hello, I have curiosity for the use of this symbol in brackets: [~].

For example, I've seen it, calling a function: [~]=function(S).

Where get stored this symbol, what it contents, and why is it used?

Thanks a lot!

Answer 1

[Azzi Abdelmalek]

Example

x=[2 1 3 0 5]
[val,idx]=sort(x)

The result

val =
   0     1     2     3     5
idx =
   4     2     1     3     5

If we want to get just idx

[~,idx]= sort(x)

the result is

 idx =
     4     2     1     3     5

[chaos4u2]

Thank you, very much!!

[Sajad Ahmad Rather]

best. Awesome....

[Prb]

So what would be an equivalent of this in python ? Can someone help me here.

[Walter Roberson]

There is no equivalent in Python. Python cannot return to multiple variables.

You need to design each Python function to return an Object (equivalent to MATLAB struct), or a tuple (which is immutable), or a list.

Whatever you decide, you could put None into the first output location. However, there still needs to be something there to receive the entire set of outputs and pull out the remaining wanted values.

[Daniel]

Thank you very much!I got it!