The npz format is just a zipped version of many npy files. The npy format is very straightforward you can read about the internal layout here:
https://docs.scipy.org/doc/numpy-1.14.0/neps/npy-format.html numpy arrays support a wider range of datatypes than J arrays but most the numeric types, including complex numbers, can be easily mapped to J equivalents. Bill's suggestion to use the J python3 addon sidesteps the issue. Read it from python and shove it into J. cheers On Wed, Dec 5, 2018 at 9:44 AM bill lam <bbill....@gmail.com> wrote: > An easier way may be read the file using python and then send arrays to J > using the python addon. > > On Wed, Dec 5, 2018, 6:34 AM Devon McCormick <devon...@gmail.com wrote: > > > Has anyone written code to convert arrays in the numpy save format (.npz > > file) to an array in J? An example of the MNIST digits recognition set > is > > here: https://s3.amazonaws.com/img-datasets/mnist.npz . > > > > I was looking to do this myself. At the moment, I'm thinking of using > > Python to read in the array, then write it back out in a text format > that J > > can read and turn into a J array but this sounds cumbersome. > > > > Does anyone have a better, more direct way than this? > > > > Thanks, > > > > Devon > > -- > > > > Devon McCormick, CFA > > > > Quantitative Consultant > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- John D. Baker bakerj...@gmail.com ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
