Tutorials Code: Source Code for Tutorial 1

From DSL

  #include <iostream>
  #include "smilearn.h"
  
  using namespace std;
  
  void PrintDataset(const DSL_dataset &d)
  {
  // The code below shows how to access crucial information form
  // a data set. 
  int v,r;
  cout << " ===================" << endl;
  cout << " -- variable info --" << endl;
  cout << "number of variables = " << d.NumVariables() << endl;
  for (v=0;v<d.NumVariables();v++)
  {
  DSL_variableInfo vi;
  d.GetVariableInfo(v,vi);
  cout << " Variable " << v << endl;
  cout << "\tid: " << vi.id << endl; 
  cout << "\t"; 
  if (vi.useInt) 
  cout << "is discrete";
  else
  cout << "is continuous";
  cout << endl;
  cout << "\tMissing element value: ";
  if (vi.useInt)
  {
  cout << vi.missingValue.i << endl;
  cout << "\tState names: ";
  for (unsigned s=0;s<vi.stateNames.size();s++)
   cout << vi.stateNames[s] << " ";
  cout << endl;
  }
  else
  cout << vi.missingValue.f << endl;
  }
  
  cout << " -- data records --" << endl;
  cout << "number of records = " << d.NumRecords() << endl;
  for (r=0;r<d.NumRecords();r++)
  {
  for (v=0;v<d.NumVariables();v++)
  {
  if (d.IsMissing(v,r))
   cout << "*";
  else
  {
   if (d.IsDiscrete(v))
     cout << d.At(v,r).i;
   else
     cout << d.At(v,r).f;
  }
  cout << "\t" ;
  }
  cout << endl;
  }
  cout << endl;
  }
  
  
  void CreateDataset()
  {
  // First we create data elements stored in std::vector
  // Please note the numbers of records for all variables
  // should be the same
  vector<int> aData;
  vector<float> bData;
  aData.push_back(1); bData.push_back(11.1f);
  aData.push_back(2); bData.push_back(22.2f);
  aData.push_back(3); bData.push_back(33.3f);
  aData.push_back(4); bData.push_back(44.4f);
  aData.push_back(5); bData.push_back(55.5f);
  
  // Here we create an empty data set (with no variables)
  DSL_dataset ds;
  
  // AddIntVar/AddFloatVar are the methods that allow to 
  // add variables with 
  // corresponding data records. The first variable added
  // in this way determines the number of records for the 
  // following variables. 
  ds.AddIntVar("MyDisc",&aData);
  ds.AddFloatVar("MyCont",&bData);
  
  // Method for printing content of a data set on the screen
  // This method is provided below. 
  PrintDataset(ds);
  
  // This code shows how to add elements by record, as well
  // how to add missing elements. 
  vector<DSL_dataElement> rec(ds.NumVariables());
  rec[0].i = DSL_MISSING_INT;   
  rec[1].f = 88.8f; 
  ds.AddRecord(rec);
  
  PrintDataset(ds);
  }
  
  
  int main()
  {
  CreateDataset();
  }
  
  
  /*
  ===================
  -- variable info --
  number of variables = 2
  Variable 0
  id: MyDisc
  is discrete
  Missing element value: -1
  State names:
  Variable 1
  id: MyCont
  is continuous
  Missing element value: -1.#IND
  -- data records --
  number of records = 5
  1       11.1
  2       22.2
  3       33.3
  4       44.4
  5       55.5
  ===================
  -- variable info --
  number of variables = 2
  Variable 0
  id: MyDisc
  is discrete
  Missing element value: -1
  State names:
  Variable 1
  id: MyCont
  is continuous
  Missing element value: -1.#IND
  -- data records --
  number of records = 6
  1       11.1
  2       22.2
  3       33.3
  4       44.4
  5       55.5
  *       88.8
  */