/********************************************************************
* Read file
********************************************************************/
void Prefixspan::read(const string &_filename, Pairdata &pairdata) {
string line;
int item;
unsigned int id = 0;
istream *is;
if (_filename == "-") {
is = &cin;
} else {
is = new ifstream(_filename.c_str());
}
Transaction transaction;
while (getline (*is, line)) {
transaction.second.clear();
vector<unsigned int> &itemsets = transaction.second;
istrstream istrs ((char *)line.c_str());
while (istrs >> item)
itemsets.push_back(item);
transaction.first = id++;
pairdata.database.push_back(transaction);
pairdata.indeces.push_back(0);
}
if (_filename != "-") {
delete is;
}
}
istream& PrefixSpan::read (istream &is)
{
string line;
vector <int> tmp;
int item;
string cc;
//record;
//vector<int>temp;
while (getline (is, line))
{
tmp.clear ();
//temp.clear();
istrstream istrs ((char *)line.c_str());
while (istrs >> item) tmp.push_back (item);//每行的数据保存在vector<string>里
// istrstream iistrs ((char *)line.c_str());
//while(iistrs >> cc)
//{temp.push_back(cc.size());cout<<cc.size()<<' ';}
transaction.push_back (tmp);//transaction 相当于一个二维数组保存了所有数据
//record.push_back(temp);
}
//cout<<record.size()<<record[0][0]<<record[0][1];
minSupLen = minsup * transaction.size();
minSupLen = minSupLen > 2? minSupLen :2;
cout<<"最小支持数："<<minSupLen<<endl;
return is;
}
