Re: Plot oddity?

[John B. Thoo]

Hi, again.  It's probably poor taste to answer my own question, but I 
think I figured it out: the two functions are not the same.  Duh!  But 
they should have the same zeros.

Thanks.  And I apologize for taking up band-width unnecessarily, 
especially on Super Bowl Sunday.

Sincerely,
---John.


On Feb 5, 2006, at 1:12 PM, John B. Thoo wrote:

> Hello, all.  I am using Octave 2.1.46 with X11 on Mac OS X 10.3.9.  
> Why don't I get identical plots in the following?
>
> ############### begin #################
> # Specify values of N, alpha, and beta
> N = 3;
> alpha = 0.1;
> beta = 1;
>
> a = -2; b = 2;  # x-range [a, b]
> c = -2; d = 2;  # y-range [c, d]
> clearplot
> axis ([a, b, c, d], "square");  # plot window
> gset nokey
> hold on
> x = a:0.01:b;
>
> plot (x, x.^(2 .* N - 1) - beta .* (abs (x)).^N ./ x + x ./ N - alpha 
> ./ N)
> plot (x, x.^(2 .* N) - beta .* (abs (x)).^N + x.^2 ./ N - (alpha ./ N) 
> .* x)
>
> hold off
> ############### end #################
>
> Is it my algebra?  Which plot is correct?  TIA.
>
> Sincerely,
> ---John.



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