1. The properties of the array itself
- shape: returns a tuple representing the dimension of the array
- ndim: a number indicating the number of dimensions of the array
- size: a number indicating the number of all data elements in the array
- dtype: the data type of the elements in the array
Second, the method of creating an array
- Created from python's list list and nested list
- Created using predetermined functions such as arange, ones/ones_like, full/full_like, eye, etc.
- np.random module build for generating random numbers
3. Commonly used functions of array
- Arithmetic operations such as element-wise addition, subtraction, multiplication, and division
- Better multidimensional array indexing
- Find aggregation functions such as sum
- Linear algebra functions, such as solving inverse matrices, etc.
