Following section (2) here:
http://ruby.gfd-dennou.org/tutorial/gokuraku/index-e.html

Trying to run this part of script I have so far:

require 'narray'
ary1 = NArray.sfloat(3,4)

I get the following error:


C:\Users\Abder-Rahman\Desktop>ruby narray.rb
./narray.rb:2: uninitialized constant NArray (NameError)
        from narray.rb:1:in `require'
        from narray.rb:1

How can this issue be solved?

Thanks.
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