python Programming Glossary: transpose

http://stackoverflow.com/questions/10508021/matrix-multiplication-in-python

Xt 1.0 1.0 0.0 0.25 0.0 0.0625 where Xt is the zip transpose of another matrix. Now here is the code def matrixmult A B C..

Writing Python bindings for C++ code that use OpenCV

http://stackoverflow.com/questions/12957492/writing-python-bindings-for-c-code-that-use-opencv

o const npy_intp _strides PyArray_STRIDES o bool transposed false for int i 0 i ndims i size i int _sizes i step i size_t.. 0 step 1 std swap size 0 size 1 std swap step 0 step 1 transposed true if ndims 3 size 2 CV_CN_MAX step 1 elemsize size 2 ndims.. the reference counter m.allocator g_numpyAllocator if transposed Mat tmp tmp.allocator g_numpyAllocator transpose m tmp m tmp..

plotting orbital trajectories in python

http://stackoverflow.com/questions/16049390/plotting-orbital-trajectories-in-python

the start and ignore the values for x2 y2 and z2 you must transpose the output first with .T x y z _ _ _ odeint deriv u0 t .T ..

calling dot products and linear algebra operations in Cython?

http://stackoverflow.com/questions/16114100/calling-dot-products-and-linear-algebra-operations-in-cython

like numpy.linalg.inv inversion numpy.dot dot product X.t transpose of matrix array . There's a large overhead to calling numpy... inversion np.linalg.inv matrix multiplication taking transpose equivalent of x.T in numpy gammaln function like scipy.gammaln.. way. If you use Cython's memoryview syntax double 1 you transpose is the same x.T as usual. Alternatively you can compute the..

Fast Way to slice image into overlapping patches and merge patches to image

http://stackoverflow.com/questions/16774148/fast-way-to-slice-image-into-overlapping-patches-and-merge-patches-to-image

A Transpose/Unzip Function in Python (inverse of zip)

http://stackoverflow.com/questions/19339/a-transpose-unzip-function-in-python-inverse-of-zip

builtin function that does that python list matrix unzip transpose share improve this question zip is its own inverse Provided..

Converting a 2D numpy array to a structured array

http://stackoverflow.com/questions/3622850/converting-a-2d-numpy-array-to-a-structured-array

'3.6' '2' newrecarray np.core.records.fromarrays myarray.transpose names 'col1 col2 col3' formats 'S8 f8 i8' print newrecarray.. of each row in the 2 D array as a record. So you have to transpose it. This behavior of numpy does not seem very intuitive but..

What are the differences between numpy arrays and matrices? Which one should I use?

http://stackoverflow.com/questions/4151128/what-are-the-differences-between-numpy-arrays-and-matrices-which-one-should-i-u

5 8 Both matrix objects and ndarrays have .T to return the transpose but matrix objects also have .H for the conjugate transpose.. but matrix objects also have .H for the conjugate transpose and .I for the inverse. In contrast numpy arrays consistently..

Numpy: Multiplying a matrix with a 3d tensor — Suggestion

http://stackoverflow.com/questions/4490961/numpy-multiplying-a-matrix-with-a-3d-tensor-suggestion

NxR matrix in T resulting in a KxMxR 3d tensor. P.dot T .transpose 1 0 2 gives the desired result. Is there a nicer solution i.e... result. Is there a nicer solution i.e. getting rid of transpose to this problem This must be quite a common operation so I assume..

Efficient Numpy 2D array construction from 1D array

http://stackoverflow.com/questions/4923617/efficient-numpy-2d-array-construction-from-1d-array

second axis. y x.reshape 3 3 print y.strides Similarly a transpose is the same as just reversing the strides of an array print..

Matrix Transpose in Python

http://stackoverflow.com/questions/4937491/matrix-transpose-in-python

Transpose in Python I am trying to create a matrix transpose function for python but I can't seem to make it work. Say I.. so far but it doesn't work def matrixTranspose anArray transposed None len anArray 0 for t in range len anArray for tt in range.. for t in range len anArray for tt in range len anArray t transposed t None len anArray transposed t tt anArray tt t print transposed..

Multivariate spline interpolation in python/scipy?

http://stackoverflow.com/questions/6238250/multivariate-spline-interpolation-in-python-scipy

2.5 7.9 3.5 3.5 3.5 # However map_coordinates expects the transpose of this coords coords.T # The mode kwarg here just controls..

python list of lists transpose without zip(*m) thing

http://stackoverflow.com/questions/6473679/python-list-of-lists-transpose-without-zipm-thing

list of lists transpose without zip m thing for instance l 1 2 3 4 5 6 7 8 9 and the.. and not r 1 4 7 2 5 8 3 6 9 Much appreciated python list transpose share improve this question How about map list zip l 1 4..

parsing HTML table using python - HTMLparser or lxml

http://stackoverflow.com/questions/9919493/parsing-html-table-using-python-htmlparser-or-lxml

'0' '1' '0' '0' '0' '0' '0' '0' '3' '0' You can use zip to transpose the table d data 4 d 0 d 0 1 zip d 'January' 'February' 'March'..