notebook.community
Edit and run
In [1]: require 'nmatrix' NMatrix.new([2, 3], [0, 1, 2, 3, 4, 5], dtype: :int64)
require 'nmatrix' NMatrix.new([2, 3], [0, 1, 2, 3, 4, 5], dtype: :int64)
Out[1]: $$\left(\begin{array}{ccc} 0&1&2\\ 3&4&5\\ \end{array}\right)$$
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