18 lines
384 B
C++
18 lines
384 B
C++
#include <cmath>
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#include "nr.h"
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using namespace std;
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void NR::ttest(Vec_I_DP &data1, Vec_I_DP &data2, DP &t, DP &prob)
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{
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DP var1,var2,svar,df,ave1,ave2;
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int n1=data1.size();
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int n2=data2.size();
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avevar(data1,ave1,var1);
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avevar(data2,ave2,var2);
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df=n1+n2-2;
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svar=((n1-1)*var1+(n2-1)*var2)/df;
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t=(ave1-ave2)/sqrt(svar*(1.0/n1+1.0/n2));
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prob=betai(0.5*df,0.5,df/(df+t*t));
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}
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