Hi all,
can anybody tell me if it is possible filling a TH1F histo directly from a file (having one only column, of float numbers)?
Namely, does it exist anything like h1->Fill(“datafile.dat”) ?
thanks!
Assuming a file test.dat containing one or more columns of data, create a small Tree and produce an histogram (see examples in $ROOTSYS/tutorials/tree)
void test() {
//read one column from a text file and histogram it
TTree T("T","test");
T.ReadFile("test.dat","x");
T.Draw("x");
}
Rene