Dataflow

#include <queryosity.hpp>

using dataflow = qty::dataflow;
namespace multithread = qty::multithread;
namespace dataset = qty::dataset;
namespace column = qty::column;
namespace selection = qty::selection;
namespace query = qty::query;
namespace systematic = qty::systematic;

int main() {

  dataflow df;

  // your analysis here...

}

The dataflow accepts (up to three) optional keyword arguments options to configure the dataset processing:

Option	Description	Default
multithread::enable(nthreads)	Enable multithreading up to nthreads.	-1 (system maximum)
multithread::disable()	Disable multithreading.
dataset::weight(scale)	Apply a global scale to all weights.	1.0
dataset::head(nrows)	Process the first nrows of the dataset.	-1 (all entries)

Example

dataflow df(multithread::enable(10), dataset::weight(1.234), dataset::head(100));