:: Dimension
: Shape
: Number of elements
: Element data type
: Byte size
Creating arrays:
a = ([2,23,4]) # list 1d print(a) # [2 23 4]
Specifies the data type:
a = ([2,23,4],dtype=) print() # int 64
dtype can specify the type of int32, float, float32, not followed by the number of default 64
a = ((3,4)) # Data all zeros, 3 rows, 4 columns """
a = ((3,4),dtype = ) # Data is 1, 3 rows and 4 columns a = ((3,4)) # data forempty，3classifier for objects in rows such as words4columns
empty type: initial content is randomized, depending on the state of the memory
a = (10,20,2) # 10-19 of data, 2 steps a = (12).reshape((3,4)) # 3classifier for objects in rows such as words4columns，0until (a time)11
reshape modifies the shape of the data, e.g. 3 rows and 4 columns.
a = (1,10,20) # starting point1，closing end10，and split into20data，Generate line segments
linspace can determine the amount of data, whereas arrage cannot, and also linspace can define structures using reshape.