+#ifndef OBSTAT_HPP
+#define OBSTAT_HPP
+
+#include <vector>
+#include <string>
+#include <map>
+#include <math.h>
+
+using namespace std;
+
+template <typename obstype>
+class obstat
+{
+public:
+ void addMeas(const obstype& val);
+ void addMeas(obstype val[], int valsize);
+
+ void computeEasy(const string& compid="one", const int& ival=0) { mean(compid, &measurements, ival); }
+
+ void computeJack(const string& compid, double (*func)(vector< vector <obstype> > *vals, void *para)=NULL, void *para=NULL);
+ void computeJack(double (*func)(vector< vector <obstype> > *vals, void *para)=NULL, void *para=NULL) { computeJack("one",func,para); }
+
+ double getMean(const string& compid="one") { return computations[compid].val; }
+ double getErr(const string& compid="one") { return computations[compid].err; }
+
+ void reset();
+
+private:
+ struct result{
+ double val;
+ double err;
+ };
+
+ vector< vector<obstype> > measurements;
+ map<string,result> computations;
+
+ void mean(const string& compid, vector< vector <double> > *meas, const int& ival);
+ void mean(const string& compid, vector< vector <int> > *meas, const int& ival);
+};
+
+
+template <typename obstype>
+void obstat<obstype>::reset()
+{
+ computations.clear();
+ measurements.clear();
+}
+
+template <typename obstype>
+void obstat<obstype>::addMeas(const obstype& val)
+{
+ measurements.push_back( vector<obstype>(1,val) );
+}
+
+template <typename obstype>
+void obstat<obstype>::addMeas(obstype val[], int valsize)
+{
+ vector<obstype> tmpvec;
+ for(int i=0; i<valsize; i++) tmpvec.push_back(val[i]);
+ measurements.push_back(tmpvec);
+}
+
+template <typename obstype>
+void obstat<obstype>::mean(const string& compid, vector< vector<double> > *meas, const int& ival)
+{
+ computations[compid].val = 0;
+ computations[compid].err = 0;
+
+ int nmeas = meas->size();
+
+ for(vector< vector<double> >::iterator measIt = meas->begin(); measIt != meas->end(); ++measIt)
+ computations[compid].val += (*measIt)[ival];
+ computations[compid].val /= nmeas;
+
+ for(vector< vector<double> >::iterator measIt = meas->begin(); measIt != meas->end(); ++measIt)
+ computations[compid].err += pow( (*measIt)[ival] - computations[compid].val, 2 );
+ computations[compid].err = sqrt( computations[compid].err ) / nmeas;
+}
+
+template <typename obstype>
+void obstat<obstype>::mean(const string& compid, vector< vector<int> > *meas, const int& ival)
+{
+ computations[compid].val = 0;
+ computations[compid].err = 0;
+
+ int nmeas = meas->size();
+
+ for(vector< vector<int> >::iterator measIt = meas->begin(); measIt != meas->end(); ++measIt)
+ computations[compid].val += (*measIt)[ival];
+ computations[compid].val /= nmeas;
+
+ for(vector< vector<int> >::iterator measIt = meas->begin(); measIt != meas->end(); ++measIt)
+ computations[compid].err += pow( (*measIt)[ival] - computations[compid].val, 2 );
+ computations[compid].err = sqrt( computations[compid].err ) / nmeas;
+}
+
+template <typename obstype>
+void obstat<obstype>::computeJack(const string& compid, double (*func)(vector< vector<obstype> > *vals, void *para), void *para)
+{
+ int nmeas=measurements.size();
+ double manymeans[nmeas];
+
+ computations[compid].val = 0;
+ computations[compid].err = 0;
+
+ int imeas=0;
+ for(typename vector< vector<obstype> >::iterator removedIt = measurements.begin(); removedIt != measurements.end(); ++removedIt, imeas++)
+ {
+ vector<obstype> removed = *removedIt;
+
+ *removedIt = measurements.back();
+ measurements.pop_back();
+
+ manymeans[imeas] = func(&measurements, para);
+ computations[compid].val += manymeans[imeas];
+
+ measurements.push_back( *removedIt );
+ *removedIt = removed;
+ }
+ computations[compid].val /= nmeas;
+
+ for(int imean=0; imean<nmeas; imean++)
+ computations[compid].err += pow( manymeans[imean] - computations[compid].val, 2 );
+ computations[compid].err *= (double)(nmeas-1)/nmeas;
+ computations[compid].err = sqrt(computations[compid].err);
+}
+
+#endif