npy-writer

This is a small Rust package for writing the NumPy file formats .npy and .npz. This package supports writing the following data types:

• Single floating points or integers
• Vectors of single floating points or integers
• N-dimensional arrays of single floating points or integers (via the ndarray feature)
• npz files mapping string keys to any of the data types above (via the zip feature)

Usage

Example of writing a .npy file with integers:

use npy_writer::NumpyWriter;
use std::fs::File;

let mut f = File::create("out.npy").unwrap();
vec![3, 2, 1].write_npy(&mut f).unwrap();

With the feature ndarray, you can write N-dimensional arrays like so:

let mut arr = Array3::zeros((2, 3, 4));
arr.write_npy(&mut f).unwrap();