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read big-endian 32bit float data using ruby numo/narray

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TL;DR

big-endian 32bit floatのデータをファイルから読み込み、Narrayオブジェクト化する。

Version

  • Ruby: 3.0.2p107
  • numo-narray: 0.9.2.0

Install

gem install numo-narray

Code

require "numo/narray"
include Numo

file_name = "PSEA.f32"
io = open(file_name, "rb")

grid = {:x => 481, :y => 505}

#読み込み
data = SFloat.from_string(io.read(grid[:x] * grid[:y] * 4))

#エンディアン変換
data = data.swap_byte

#整形
data.reshape!(grid[:x], grid[:y])

p data

io.close

参考

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