conditional assignment

Hi all

I want to conditionally operate on certain elements of a matrix, let me
explain it with a simple vector example

z<- c(1, 2, 3)
zz <- c(0,0,0)
null <- (z > 2) & ( zz <- z)
zz

[1] 1 2 3

why zz is not (0, 0, 3) ?????


the null <- assignment is to keep the console silent

in the other hand, it curious that null has reasonable values

null

[1] FALSE FALSE  TRUE

Thanks in advance

	Ulisses

                Debian GNU/Linux: a dream come true
-----------------------------------------------------------------------------
"Computers are useless. They can only give answers."            Pablo Picasso

Humans are slow, innaccurate, and brilliant.
Computers are fast, acurrate, and dumb. 
Together they are unbeatable

--->	Visita http://www.valux.org/ para saber acerca de la	<---
--->	Asociaci?n Valenciana de Usuarios de Linux		<---