Getting back to this, byteswap() looks like a general endian solution for ndarrays: https://stackoverflow.com/questions/49578507/fast-way-to-reverse-float32-end... The examples there specify float32 format for opening a file, but that seemed to scramble the header that was output. No header being the desired behavior for the BE file, which happened to occur when using byteswap from the same program that made the mem-mapped data that was the normal ndarray, in which case no header was written (conveniently for java). Little-endian access can be handled in java with ByteBuffer.order(). Bill -- Phobrain.com On 2023-01-01 08:31, Jerome Kieffer wrote:
On Sun, 01 Jan 2023 05:31:55 -0800 Bill Ross <bross_phobrain@sonic.net> wrote:
Thanks!
Java is known to be big-endian ... your CPU is probably little-endian. $ lscpu | grep -i endian Byte Order: Little Endian
Numpy has the tools to represent an array of double BE. Is there a lower-level ndarray method that writes an array that could be used this way?
One example: [not applicable, redacted over bounce of previous try] _______________________________________________ NumPy-Discussion mailing list -- numpy-discussion@python.org To unsubscribe send an email to numpy-discussion-leave@python.org https://mail.python.org/mailman3/lists/numpy-discussion.python.org/ Member address: bross_phobrain@sonic.net