matlib is a small matrix package with a focus on data exchange and simple
math functions. This is a fork of the GreenDelta/matlib
with the dependencies to the native solver library removed. It would be probably
good to merge this back later and create a package matsolve or similar which
contains the native parts.
This package provides methods for loading (goblapack.Load) and saving
(goblapack.Save) matrices from files in a simple binary format:
header 8 bytes
4 bytes: uint32, number of rows, little endian order
4 bytes: uint32, number of columns, little endian order
content, rows * columns * 8 bytes:
matrix data, float64, little endian and column major order
Here is a small Python script for writing a NumPy matrix in this format:
m = numpy.load('path/to/file.npy')
rows, cols = m.shape
with open('path/to/file.bin', 'wb') as f:
f.write(struct.pack("<i", rows))
f.write(struct.pack("<i", cols))
for col in range(0, cols):
for row in range(0, rows):
val = m[row, col]
f.write(struct.pack("<d", val))