Numpy Array of type Boolean

Returns an element that is greater than 10, given a list.

There are two ways to do this in Python. One method is loop traversal, the second method is to use the built-in function filter ()

　　

　　

In the array, there is an easier way. That is, the Boolean index

Boolean index:

A Boolean array of the same size is passed into the index, which returns an array of all the elements that correspond to the true position of the moth.

Make a cushion first.

　　

　　

So, here comes the point.

　　　　

ARR>10 will determine each element in the array arr, returning a Boolean array.

Two-and or non-

1 Given a list, returns an element that is greater than 10 and is even.

　　

Description

1) & is actually a bitwise-and concept

　　　　　　

0101 =5

0110 =6

Add

0100 = 4 you got it!

2) & brackets on both sides because the,& operator has a higher precedence.

2 Given a list, returns an element that is greater than 10, or even. |

3 Given a list, returns an array of no greater than 10. ~

Numpy Array of type Boolean