numpy Functions by Category

It can be hard to know what functions are available in numpy. This is not a complete list, but it does cover most of them. Links point to the example list with internal documentation (it's a large page, it may take a moment to load before it jumps to the appropriate section).

Array creation

Numerical

• arange(), arrayrange()

• linspace(), logspace()

Ones and zeros

• empty(), empty_like()

• eye(), identity()

• ones(), ones_like()

• tri(), tril(), triu()

• zeros(), zeros_like()

From existing data

• array(), recarray()

• asarray(), asanyarray(), asmatrix()

• copy()

• fromarrays(), frombuffer(), fromfile(), fromfunction(), fromiter(), loadtxt()

Building matrices

• bmat()

• diag(), diagflat()

• mat(), matrix()

• vander()

Reinterpreting arrays

• view()

Types

• astype()

• cast[]()

• int8(), int16(), int32(), int64(), int128()

• uint8(), uint16(), uint32(), uint64(), uint128()

• float16(), float32(), float64(), float96(), float128(), float256()

• complex32(), complex64(), complex128(), complex192(), complex256(), complex512()

• bool_()

• object_()

• void(), str_(), unicode_()

• byte(), ubyte()

• short(), ushort()

• intc(), uintc()

• intp(), uintp()

• int_(), uint()

• longlong(), ulonglong()

• single(), csingle()

• float_(), complex_()

• longfloat(), clongfloat()

Kinds of array

• asarray()

• asanyarray()

• asmatrix()

Changing the number of dimensions

• atleast_1d(), atleast_2d(), atleast_3d()

• broadcast()

• expand_dims()

• squeeze()

Transpose-like operations

• rollaxis()

• swapaxes()

• T, transpose()

Reshaping arrays

• flat, flatten()

• ravel()

• reshape(), shape

Array modification

Joining arrays

• append()

• column_stack()

• concatenate()

• dstack(), hstack(), vstack()

Splitting arrays

• array_split()

• dsplit(), hsplit(), split(), vsplit()

Enlarging arrays

• tile()

• repeat()

Adding and removing elements

• delete()

• insert()

• resize()

• trim_zeros()

• unique()

Rearranging elements

• fliplr(), flipud()

• reshape()

• roll()

• rot90()

Indexing

• []

• take()

• put()

• putmask()

Indexing syntax

• ...

• slice()

• newaxis

• index_exp[]

Generating arrays suitable for indexing

• c_[]

• r_[]

• s_[]

• nonzero()

• where()

• indices()

• ix_()

• mgrid[]

• ogrid()

Indexing-like operations

• choose()

• where()

• compress()

• diag(), diagonal()

• select()

Iterating

• flat

• ndenumerate()

• ndindex()

Logic

• []

• all(), any()

• allclose()

• alltrue()

• nonzero()

• piecewise()

• sometrue()

Finding things

• argmax(), argmin()

• searchsorted()

Array statistics

• average(), mean()

• bincount(), histogram()

• corrcoef()

• cov()

• max(), min(), ptp()

• median()

• std(), var()

ufuncs

• abs(), absolute()

• add(), multiply()

• angle()

• arccos(), arcsin(), arctan()

• arccosh(), arcsinh(), arctanh()

• arctan2()

• bitwise_and(), bitwise_or(), bitwise_xor()

• ceil(), floor(), round()

• conj(), conjugate()

• cos(), sin(), tan()

• cosh(), sinh(), tanh()

• fix()

• hypot()

• logical_and(), logical_not(), logical_or(), logical_xor()

• maximum(), minimum()

ufunc methods

• accumulate()

• outer()

• reduce()

Functional constructs

• apply_along_axis()

• apply_over_axis()

• vectorize()

Random numbers

• beta(), binomial(), gumbel(), poisson(), standard_normal(), uniform(), vonmises(), weibull()

• bytes()

• permutation()

• rand(), randint(), randn()

• random_integers()

• random_sample()

• ranf()

• sample()

• seed()

• shuffle()

Array math

• clip()

• cross()

• cumprod(), cumsum()

• diff()

• digitize()

• dot()

• inner()

• outer()

• inv(), pinv()

• poly1d()

• polyfit()

• prod(), sum()

• tensordot()

• vdot()

FFT

• fft()

• fftfreq()

• fftshift()

• ifft()

Linear algebra

• inv()

• lstsq()

• solve()

• svd()

• trace()

Array output

• savetxt()

• set_printoptions()

• tofile()

• tolist()

Other

• sort(), argsort()

• binary_repr()

• dtype()

• fill()

• finfo()

• generic

• imag, real

• inf, nan

• item()

• lexsort()

• ndim

• shape

• typeDict()