geometric transformations

[Rick Hensh]

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Perhaps someone can help. It is easy to use PSTricks and specials to graph
the function,
say

	y = f[x]

For example, if f[x] = x*(1-x) I've successfully tried

\special{!/myfunction {x dup 1 exch sub mul} bind def}
\psplot[myparem]{-5}{5}{myfunction}

Now I would like to sketch    y = f[x-2]     by trying something like

\psplot[myparem]{-5}{5}{x 2 sub myfunction}

but it doesn't work (I didn't think that it would.

I realize that I could "cheat" and reposition my axes or just redefine my
function but
is it possible to actually "transform" the function?

thanks in advance
ricky

PS. I know I'm supposed to use \pstVerb or \pstverb but I wasn't successful
so I tried
the \special  command.


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