Isotope.Utils.write_to_file

You're seeing just the function write_to_file, go back to Isotope.Utils module for more information.
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write_to_file(noisemap, filename)

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Specs

write_to_file(Isotope.Noise.noisemap(), String.t()) :: {:ok, String.t()}

Writes the given noise map to a PNG file.

iex> {:ok, noise} = Isotope.Noise.new()
iex> {:ok, "/tmp/my_test_noise.png"} =
...>   noise
...>     |> Isotope.Noise.noise_map({200, 200})
...>     |> Isotope.Utils.write_to_file("/tmp/my_test_noise.png")