4.5 Functions to construct arrays

The usual way to set up an array is via a list. But there are also a couple of convenient methods for generating special arrays, which are given in Table 4.5:

Methods	Shape	Generates
zeros((n,m))	(n,m)	Matrix filled with zeros
ones((n,m))	(n,m)	Matrix filled with ones
full((n,m),q)	(n,m)	Matrix filled with
diag(v,k)	(n,n)	(Sub-, super-) diagonal matrix from a vector
random.rand(n,m)	(n,m)	Matrix filled with uniformly distributed random numbers in (0,1)
arange(n)	(n,)	First  integers
linspace(a,b,n)	(n,)	Vector with  equispaced points between  and

Table 4.5: Commands to create arrays

These commands may take additional arguments. In particular, the commands zeros, ones, full, and arange take dtype as an optional argument. The default type is float, except for arange. There are also methods...