Auxiliary Utilities

The package also provides other convenience tools.


This function accepts arbitrary arguments and returns nothing.

It is mainly used as a callback function where you don’t really need to callback to do anything.

shrink(x, t)

Compute the following function:

(x, t) \mapsto \begin{cases}
    x - t & (x > t) \\
    0 & (|x| \le t) \\
    x + t & (x < -t)

Here, x can be either a scalar or an array (for vectorized computation).