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Re: plotting even function
From: |
Mike Miller |
Subject: |
Re: plotting even function |
Date: |
Sun, 20 Mar 2005 13:29:49 -0600 (CST) |
On Sun, 20 Mar 2005, Geraint Paul Bevan wrote:
$ g++ a.cc && ./a.out
+1^2.0 1
- -1^2.0 1
+1^0.5 1
- -1^0.5 nan
As you can see from the results above, the double version of pow cannot
cope with a negative base and non-integer exponent. Therefore in this
case Octave uses the Complex (i.e. complex<double>) version of pow. It
is this routine which is finding complex solutions for negative x
instead of the real root that would be required for symmetry about the
y-axis.
That's a very complete answer! Thanks.
Mike
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Re: plotting even function, Henry F. Mollet, 2005/03/19
Re: plotting even function, Geraint Paul Bevan, 2005/03/19