/
Histogram.hpp
51 lines (46 loc) · 1.7 KB
/
Histogram.hpp
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template<typename Number>
std::vector<int> bin(int numBins, const Number& min, const Number& max, const std::vector<Number>& data){
int n=data.size();
std::vector<int> bins(numBins, 0);
double binWidth=(max-min)/numBins;
for(int i=0; i<n; ++i){
bins[(int)(data[i]-min)/binWidth]++;
}
return bins;
}
template<typename Number, typename WS>
void binAndSend(WS& ws, int numBins, const Number& min, const Number& max, const std::vector<Number>& data){
int n=data.size();
std::vector<int> bins(numBins, 0);
double binWidth=(max-min)/numBins;
double orderMagnitude=max-min;
orderMagnitude=pow(10.0, 2-(int)log10(orderMagnitude));
for(int i=0; i<n; ++i){
bins[(int)((data[i]-min)/binWidth)]++;
}
std::stringstream wsMessage;
wsMessage<<"{\"bins\":[";
for(int i=0; i<(numBins-1); ++i){
wsMessage<<"\""<<((int)((min+i*binWidth)*orderMagnitude))/orderMagnitude<<"-"<<((int)((min+(i+1)*binWidth)*orderMagnitude))/orderMagnitude<<"\",";
}
wsMessage<<"\""<<((int)((min+(numBins-1)*binWidth)*orderMagnitude))/orderMagnitude<<"-"<<((int)((min+numBins*binWidth)*orderMagnitude))/orderMagnitude<<"\"], \"count\":[";
for(int i=0; i<(numBins-1); ++i){
wsMessage<<bins[i]<<",";
}
wsMessage<<bins[numBins-1]<<"]}";
ws(wsMessage.str());
}
template<typename Number, typename WS>
void binAndSend(WS& ws, Number& min, Number& max, const std::vector<Number>& data){
int n=data.size();
for(int i=0; i<n; ++i){
if(data[i]<min){
min=data[i];
}
else if(data[i]>max){
max=data[i];
}
}
int numBins=2*pow(n, 1.0/3.0);//Rice Rule
binAndSend(ws, numBins, min, max, data);
}