Array creation routines

From shape or value

empty(shape[, dtype])	Return a new array of given shape and type, without initializing entries.
empty_like(prototype[, dtype])	Return a new array with the same shape and type as a given array.
eye(N[, M, k, dtype])	Return a 2-D array with ones on the diagonal and zeros elsewhere.
identity(n[, dtype])	Return the identity array.
ones(shape[, dtype])	Return a new array of given shape and type, filled with ones.
ones_like(a[, dtype, shape])	Return an array of ones with the same shape and type as a given array.
zeros(shape[, dtype])	Return a new array of given shape and type, filled with zeros.
zeros_like(a[, dtype, shape])	Return an array of zeros with the same shape and type as a given array.
full(shape, value[, dtype])	Return a new array of given shape and type, filled with fill_value.
full_like(a, value[, dtype, shape])	Return a full array with the same shape and type as a given array.

From existing data

array(object[, dtype, copy])	Create an array.
asarray(a[, dtype])	Convert the input to an array.
copy(a)	Return an array copy of the given object.
repeat(a, repeats[, axis])	Repeat elements of an array.

Numerical ranges

arange([start,] stop[, step,][, dtype])	Return evenly spaced values within a given interval.
linspace(start, stop[, num, endpoint, ...])	Return evenly spaced numbers over a specified interval.

Building matrices

diag(v[, k])	Extract a diagonal or construct a diagonal array.
tri(N[, M, k, dtype, like])	An array with ones at and below the given diagonal and zeros elsewhere.
tril(m[, k])	Lower triangle of an array.
triu(m[, k])	Upper triangle of an array.