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, order, shape])	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(prototype[, dtype, order, 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, without initializing entries.
zeros_like(prototype[, dtype, order, shape])	Return an array of zeros with the same shape and type as a given array.

From existing data

array(object[, dtype, copy, order, ndmin, subok])	Creates a BlockArray.
copy(a[, order, subok])	Return an array copy of the given object.
loadtxt(fname[, dtype, comments, delimiter, ...])	Load data from a text file.

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.
logspace(start, stop[, num, endpoint, base, ...])	Return numbers spaced evenly on a log scale.

Building matrices

diag(v[, k])

Extract a diagonal or construct a diagonal array.