python Programming Glossary: np.ndarray

http://stackoverflow.com/questions/16983843/fast-interpolation-of-grid-data

interpolation of grid data I have a large 3d np.ndarray of data that represents a physical variable sampled over a volume..

creating small arrays in cython takes a humongous amount of time

http://stackoverflow.com/questions/18410342/creating-small-arrays-in-cython-takes-a-humongous-amount-of-time

as np cimport numpy as np cimport cython def BareBones np.ndarray double ndim 1 a np.ndarray double ndim 1 u r return u def UntypedWithLoop.. np cimport cython def BareBones np.ndarray double ndim 1 a np.ndarray double ndim 1 u r return u def UntypedWithLoop a u r cdef int.. for i in range u.shape 0 j i return u j def BSReplacement np.ndarray double ndim 1 a np.ndarray double ndim 1 u cdef np.ndarray np.int_t..

Simple wrapping of C code with cython

http://stackoverflow.com/questions/3046305/simple-wrapping-of-c-code-with-cython

int fc int N double a double b double z # z a b def fpy N np.ndarray np.double_t ndim 1 A np.ndarray np.double_t ndim 1 B np.ndarray.. double z # z a b def fpy N np.ndarray np.double_t ndim 1 A np.ndarray np.double_t ndim 1 B np.ndarray np.double_t ndim 1 Z wrap np.. np.double_t ndim 1 A np.ndarray np.double_t ndim 1 B np.ndarray np.double_t ndim 1 Z wrap np arrays to fc a.data ... assert..

Subclassing numpy ndarray problem

http://stackoverflow.com/questions/5149269/subclassing-numpy-ndarray-problem

not change the array Thanks. import numpy as np class Data np.ndarray def __new__ cls inputarr obj np.asarray inputarr .view cls return.. if you want it as a method import numpy as np class Data np.ndarray def __new__ cls inputarr obj np.asarray inputarr .view cls return..

Numpy vs Cython speed

http://stackoverflow.com/questions/7799977/numpy-vs-cython-speed

False @cython.nonecheck False cdef _process np.ndarray DTYPE_t ndim 2 array cdef unsigned int rows array.shape 0 cdef.. unsigned int cols array.shape 1 cdef unsigned int row cdef np.ndarray DTYPE_t ndim 2 out np.zeros rows cols for row in range 0 rows.. row np.sum array array row axis 0 return out def main cdef np.ndarray DTYPE_t ndim 2 data cdef np.ndarray DTYPE_t ndim 2 out data..

Concatenate Numpy arrays without copying

http://stackoverflow.com/questions/7869095/concatenate-numpy-arrays-without-copying

into a view i.e. without copying Would that require an np.ndarray subclass python multidimensional array numpy share improve..

How to integrate SQLAlchemy and a subclassed Numpy.ndarray smoothly and in a pythonic way?

http://stackoverflow.com/questions/8940802/how-to-integrate-sqlalchemy-and-a-subclassed-numpy-ndarray-smoothly-and-in-a-pyt

# is smoothly integrated into SQLAlchemy class MyNumpy np.ndarray _DTO DTONumpy def __new__ cls amount name '' dto cls._DTO amount.. MyNumpy.getDTO return self._my_numpies class MyNumpy np.ndarray _DTO DTONumpy def __new__ cls amount name '' dto cls._DTO amount..