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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<TITLE>ERFC Complimentary Error Function
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<H2>ERFC Complimentary Error Function
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Section: <A HREF=sec_mathfunctions.html> Mathematical Functions </A>
<H3>Usage</H3>
Computes the complimentary error function for real arguments. The <code>erfc</code>
function takes only a single argument
<PRE>
y = erfc(x)
</PRE>
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where <code>x</code> is either a <code>float</code> or <code>double</code> array. The output
vector <code>y</code> is the same size (and type) as <code>x</code>.
<H3>Function Internals</H3>
The erfc function is defined by the integral:
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<IMG SRC="erfc_eqn1.png">
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and is the integral of the normal distribution.
<H3>Example</H3>
Here is a plot of the <code>erfc</code> function over the range <code>[-5,5]</code>.
<PRE>
--> x = linspace(-5,5);
--> y = erfc(x);
--> plot(x,y); xlabel('x'); ylabel('erfc(x)');
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which results in the following plot.
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<IMG SRC="erfc1.png">
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