20 lines
271 B
C++
20 lines
271 B
C++
#include "nr.h"
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void NR::avevar(Vec_I_DP &data, DP &ave, DP &var)
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{
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DP s,ep;
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int j;
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int n=data.size();
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ave=0.0;
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for (j=0;j<n;j++) ave += data[j];
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ave /= n;
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var=ep=0.0;
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for (j=0;j<n;j++) {
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s=data[j]-ave;
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ep += s;
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var += s*s;
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}
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var=(var-ep*ep/n)/(n-1);
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}
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