Useful Functions#

Here are some useful functions to use with PBA objects.

pba.core.env(*args)#: Warning

Deprecated function, use envelope() instead.

pba.core.envelope(*args: Interval | Pbox | float) → Interval | Pbox#

Allows the envelope to be calculated for intervals and p-boxes.

The envelope is the smallest interval/pbox that contains all values within the arguments.

Parameters:: *args: The arguments for which the envelope needs to be calculated. The arguments can be intervals, p-boxes, or floats.
Returns:: Pbox|Interval: The envelope of the given arguments, which can be an interval or a p-box.

Error

ValueError: If less than two arguments are given.

TypeError: If none of the arguments are intervals or p-boxes.

pba.core.mean(*args: list | tuple, method='f')#

Allows the mean to be calculated for intervals and p-boxes

Parameters:

l : list of pboxes or intervals

method : pbox addition method to be used

Output:

Interval | Pbox: mean of interval or pbox objects within *args

Important

Implemented as

>>> pba.sum(*args,method = method)/len(args)

pba.core.mul(*args, method=None)#

pba.core.sqrt(a)#

pba.core.sum(*args: list | tuple, method='f')#

Allows the sum to be calculated for intervals and p-boxes

Parameters:

*args: pboxes or intervals method (f,i,o,p): addition method to be used

Returns:

Interval | Pbox: sum of interval or pbox objects within *args

Note

If a list or tuple is given as the first argument, the elements of the list or tuple are used as arguments. If only one (non-list) argument is given, the argument is returned.