Re: plotting even function

[Henry F. Mollet]

I would have thought that y = x^b is only symmetrical about y-axis if b = 0,
2, 4, etc, i.e. b = even integer.
Henry



on 3/19/05 4:20 PM, John B. Thoo at address@hidden wrote:

> Hi.  I hope that I'm not embarrassing myself by asking the following.
> 
> I believe that
> 
>       3       2/3    1
>  y = --- (2 x)    + ---
>       4              2
> 
> is an even function, yet
> 
> x = -1:0.04:1;
> plot (x, 0.75 * (2 .* x).^(2 / 3) + 0.5)
> 
> is not symmetrical about the y-axis.  What is wrong with my thinking?
> 
> TIA.
> ---John.
> 
> 
> 
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