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Re: Fwd: qfunc/qfuncinv implementation in communications package
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From: |
Julien Bect |
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Subject: |
Re: Fwd: qfunc/qfuncinv implementation in communications package |
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Date: |
Fri, 25 Jan 2013 07:49:49 -0800 (PST) |
On 24/01/13 19:26, Richardson, Anthony wrote:
> The function qfunc() in the communications package is currently
> implemented as:
> y = 1-normcdf(x);
It should be normcdf(-x) instead. This is what I get under Octave 3.6.2 :
octave:9> 1 - normcdf(7)
ans = 1.27986510278788e-12
octave:10> normcdf(-7)
ans = 1.27981254388584e-12
octave:11> 1 - normcdf(18)
ans = 0
octave:12> normcdf(-18)
ans = 9.74094891893730e-73
Best regards,
Julien.
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