From: Marcio Braga <mbraga0001@...>
Date: 2008-08-17T23:22:06+09:00
Subject: Re: Matrix: Need help to understand this behavior

Just to complement, as a contrast, the code below works as expected, or 
in other words, the content of matrix "a" is not changed when you change 
the content of matrix "b".

b=[]
a=[1]
b[0]=a[0]     # explicitly set a single element and not the entire 
matrix
b[0]=2*b[0]
p a

Marcio


Marcio Braga wrote:
> a=[1]
> b=a          # make matrix "b" equal matrix "a", but expected 2
> separated matrices
> b[0]=2*b[0]  # I want to change matrix "b" (and not matrix "a")
> p a          # print matrix "a" and see the "issue"
> 
> The expected value in the matrix "a" should be 1, but instead it is 2.
> 
> Why ?
> 
> Thank you.
> Marcio

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