Method GetFreqDesc

src/utils/VectorOps/VectorOps.cpp:295–328

}

string VectorOps::GetFreqDesc(void)
{
    // compute the frequency of each unique value
    map<string, int> freqs;
    vector<string>::const_iterator dIt  = _vecs.begin();
    vector<string>::const_iterator dEnd = _vecs.end();
    for (; dIt != dEnd; ++dIt) {
        freqs[*dIt]++;
    }
    // pair for the num times a values was
    // observed (1) and the value itself (2)
    pair<int, string> freqPair;
    vector< pair<int, string> > freqList;

    // create a list of pairs of all the observed values (second)
    // and their occurences (first)
    map<string,int>::const_iterator mapIter = freqs.begin();
    map<string,int>::const_iterator mapEnd  = freqs.end();
    for(; mapIter != mapEnd; ++mapIter)
        freqList.push_back( make_pair(mapIter->second, mapIter->first) );

    // sort the list of pairs in the requested order by the frequency
    // this will make the value that was observed least/most bubble to the top
    sort(freqList.begin(), freqList.end(), ValueGreaterThan());

    // record all of the values and their frequencies.
    ostringstream buffer;
    vector< pair<int, string> >::const_iterator iter    = freqList.begin();
    vector< pair<int, string> >::const_iterator iterEnd = freqList.end();
    for (; iter != iterEnd; ++iter)
        buffer << iter->second << ":" << iter->first << _delimStr;
    
    return buffer.str();
}


string VectorOps::GetFreqAsc(void)