// TestCSV
func main() {
var reader io.Reader
var err error
if reader, err = os.Open("pima-indians-diabetes.csv"); err != nil {
log.Fatalf("%v", err)
}
handler := &Handler{}
err = db.Import(reader, handler)
targetBool := make([]bool, handler.target.Len())
targetNumeric := make([]float64, handler.target.Len())
for i := 0; i < handler.target.Len(); i++ {
targetBool[i] = handler.target.NumericValue(i) == 1.0
targetNumeric[i] = handler.target.NumericValue(i)
}
if err != nil {
log.Fatal("Import returned error")
}
fmt.Printf("target: %v\n", handler.target)
rf := db.NewRandomForestRegressor(100)
oobScores := rf.Fit(handler.features, handler.target)
auc := db.ROCArea(oobScores, targetBool)
mse := db.MSE(oobScores, targetNumeric)
variance := stats.Variance(targetNumeric)
fmt.Printf("ROCArea: %v MSE: %v Var: %v\n", auc, mse, variance)
}
// TestCSV
func TestCSV(test *testing.T) {
reader := strings.NewReader(data)
err := csv.Import(reader, &Handler{test, nil, 0})
if err != nil {
test.Error("Import returned error")
}
if !finalizeCalled {
test.Error("Finalize was never called")
}
if abortCalled {
test.Error("Abort should not have been called")
}
}
func TestCSVHandler(t *testing.T) {
reader := strings.NewReader(`apple,baker,Charlie
1,"x","foo"
4,"5","baz"`)
handler := db.NewCSVHandler(featureFactory)
if db.Import(reader, handler) != nil {
t.Error("Import() returned an error")
}
df := handler.DataFrame()
for i := 0; i < 2; i++ {
for j := 0; j < 3; j++ {
// fmt.Printf("%v ", df.Get(i, j))
df.Get(i, j)
}
}
}