From: "trans.  (T. Onoma)" <transami@...>
Date: 2004-10-13T23:13:12+09:00
Subject: Re: The Challenge of R

On Wednesday 13 October 2004 04:24 am, Ara.T.Howard@noaa.gov wrote:
| i did not write it, but narray does all that you want, and more, including
| being extremely fast, doing simply display of data in X, and working
| seamlessly with memory mapping:

I did not know NArray worked elementwise. Nice. For numbers at least, that's 
one hell of a solution Ara ;)

|    jib:~ > cat a.rb
|    require 'narray'
|
|    a = NArray[1..10]
|    b = a + 5
|    p b
|
|    c = b
|    pos = 0,1,2,4,6           # adjust R's 1 based idx to ruby's 0 based
|    c[pos] = c[pos] * 10
|    p c
|
|    d = c
|    d[(d % 2).eq(0).where] = -1
|    p d
|
|    jib:~ > ruby a.rb
|    NArray.int(10):
|    [ 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ]
|    NArray.int(10):
|    [ 60, 70, 80, 9, 100, 11, 120, 13, 14, 15 ]
|    NArray.int(10):
|    [ -1, -1, -1, 9, -1, 11, -1, 13, -1, 15 ]
|
| you can thank Masahiro Tanaka for such a great work.
|
| http://www.ir.isas.ac.jp/~masa/ruby/index-e.html

Double thanks!

T.