diff --git a/src/data_csv/iris.csv b/src/data_csv/iris.csv
index ba0ebd24cdaa69caacdc7b95f189f39a7e830e3e..7b985b0edde86c6a04473cd7748b4e6be669ae41 100644
--- a/src/data_csv/iris.csv
+++ b/src/data_csv/iris.csv
@@ -1,151 +1,151 @@
 sepal_length,sepal_width,petal_length,petal_width,species
-5.1,3.5,1.4,0.2,setosa
-4.9,3.0,1.4,0.2,setosa
-4.7,3.2,1.3,0.2,setosa
-4.6,3.1,1.5,0.2,setosa
-5.0,3.6,1.4,0.2,setosa
-5.4,3.9,1.7,0.4,setosa
-4.6,3.4,1.4,0.3,setosa
-5.0,3.4,1.5,0.2,setosa
-4.4,2.9,1.4,0.2,setosa
-4.9,3.1,1.5,0.1,setosa
-5.4,3.7,1.5,0.2,setosa
-4.8,3.4,1.6,0.2,setosa
-4.8,3.0,1.4,0.1,setosa
-4.3,3.0,1.1,0.1,setosa
-5.8,4.0,1.2,0.2,setosa
-5.7,4.4,1.5,0.4,setosa
-5.4,3.9,1.3,0.4,setosa
-5.1,3.5,1.4,0.3,setosa
-5.7,3.8,1.7,0.3,setosa
-5.1,3.8,1.5,0.3,setosa
-5.4,3.4,1.7,0.2,setosa
-5.1,3.7,1.5,0.4,setosa
-4.6,3.6,1.0,0.2,setosa
-5.1,3.3,1.7,0.5,setosa
-4.8,3.4,1.9,0.2,setosa
-5.0,3.0,1.6,0.2,setosa
-5.0,3.4,1.6,0.4,setosa
-5.2,3.5,1.5,0.2,setosa
-5.2,3.4,1.4,0.2,setosa
-4.7,3.2,1.6,0.2,setosa
-4.8,3.1,1.6,0.2,setosa
-5.4,3.4,1.5,0.4,setosa
-5.2,4.1,1.5,0.1,setosa
-5.5,4.2,1.4,0.2,setosa
-4.9,3.1,1.5,0.1,setosa
-5.0,3.2,1.2,0.2,setosa
-5.5,3.5,1.3,0.2,setosa
-4.9,3.1,1.5,0.1,setosa
-4.4,3.0,1.3,0.2,setosa
-5.1,3.4,1.5,0.2,setosa
-5.0,3.5,1.3,0.3,setosa
-4.5,2.3,1.3,0.3,setosa
-4.4,3.2,1.3,0.2,setosa
-5.0,3.5,1.6,0.6,setosa
-5.1,3.8,1.9,0.4,setosa
-4.8,3.0,1.4,0.3,setosa
-5.1,3.8,1.6,0.2,setosa
-4.6,3.2,1.4,0.2,setosa
-5.3,3.7,1.5,0.2,setosa
-5.0,3.3,1.4,0.2,setosa
-7.0,3.2,4.7,1.4,versicolor
-6.4,3.2,4.5,1.5,versicolor
-6.9,3.1,4.9,1.5,versicolor
-5.5,2.3,4.0,1.3,versicolor
-6.5,2.8,4.6,1.5,versicolor
-5.7,2.8,4.5,1.3,versicolor
-6.3,3.3,4.7,1.6,versicolor
-4.9,2.4,3.3,1.0,versicolor
-6.6,2.9,4.6,1.3,versicolor
-5.2,2.7,3.9,1.4,versicolor
-5.0,2.0,3.5,1.0,versicolor
-5.9,3.0,4.2,1.5,versicolor
-6.0,2.2,4.0,1.0,versicolor
-6.1,2.9,4.7,1.4,versicolor
-5.6,2.9,3.6,1.3,versicolor
-6.7,3.1,4.4,1.4,versicolor
-5.6,3.0,4.5,1.5,versicolor
-5.8,2.7,4.1,1.0,versicolor
-6.2,2.2,4.5,1.5,versicolor
-5.6,2.5,3.9,1.1,versicolor
-5.9,3.2,4.8,1.8,versicolor
-6.1,2.8,4.0,1.3,versicolor
-6.3,2.5,4.9,1.5,versicolor
-6.1,2.8,4.7,1.2,versicolor
-6.4,2.9,4.3,1.3,versicolor
-6.6,3.0,4.4,1.4,versicolor
-6.8,2.8,4.8,1.4,versicolor
-6.7,3.0,5.0,1.7,versicolor
-6.0,2.9,4.5,1.5,versicolor
-5.7,2.6,3.5,1.0,versicolor
-5.5,2.4,3.8,1.1,versicolor
-5.5,2.4,3.7,1.0,versicolor
-5.8,2.7,3.9,1.2,versicolor
-6.0,2.7,5.1,1.6,versicolor
-5.4,3.0,4.5,1.5,versicolor
-6.0,3.4,4.5,1.6,versicolor
-6.7,3.1,4.7,1.5,versicolor
-6.3,2.3,4.4,1.3,versicolor
-5.6,3.0,4.1,1.3,versicolor
-5.5,2.5,4.0,1.3,versicolor
-5.5,2.6,4.4,1.2,versicolor
-6.1,3.0,4.6,1.4,versicolor
-5.8,2.6,4.0,1.2,versicolor
-5.0,2.3,3.3,1.0,versicolor
-5.6,2.7,4.2,1.3,versicolor
-5.7,3.0,4.2,1.2,versicolor
-5.7,2.9,4.2,1.3,versicolor
-6.2,2.9,4.3,1.3,versicolor
-5.1,2.5,3.0,1.1,versicolor
-5.7,2.8,4.1,1.3,versicolor
-6.3,3.3,6.0,2.5,virginica
-5.8,2.7,5.1,1.9,virginica
-7.1,3.0,5.9,2.1,virginica
-6.3,2.9,5.6,1.8,virginica
-6.5,3.0,5.8,2.2,virginica
-7.6,3.0,6.6,2.1,virginica
-4.9,2.5,4.5,1.7,virginica
-7.3,2.9,6.3,1.8,virginica
-6.7,2.5,5.8,1.8,virginica
-7.2,3.6,6.1,2.5,virginica
-6.5,3.2,5.1,2.0,virginica
-6.4,2.7,5.3,1.9,virginica
-6.8,3.0,5.5,2.1,virginica
-5.7,2.5,5.0,2.0,virginica
-5.8,2.8,5.1,2.4,virginica
-6.4,3.2,5.3,2.3,virginica
-6.5,3.0,5.5,1.8,virginica
-7.7,3.8,6.7,2.2,virginica
-7.7,2.6,6.9,2.3,virginica
-6.0,2.2,5.0,1.5,virginica
-6.9,3.2,5.7,2.3,virginica
-5.6,2.8,4.9,2.0,virginica
-7.7,2.8,6.7,2.0,virginica
-6.3,2.7,4.9,1.8,virginica
-6.7,3.3,5.7,2.1,virginica
-7.2,3.2,6.0,1.8,virginica
-6.2,2.8,4.8,1.8,virginica
-6.1,3.0,4.9,1.8,virginica
-6.4,2.8,5.6,2.1,virginica
-7.2,3.0,5.8,1.6,virginica
-7.4,2.8,6.1,1.9,virginica
-7.9,3.8,6.4,2.0,virginica
-6.4,2.8,5.6,2.2,virginica
-6.3,2.8,5.1,1.5,virginica
-6.1,2.6,5.6,1.4,virginica
-7.7,3.0,6.1,2.3,virginica
-6.3,3.4,5.6,2.4,virginica
-6.4,3.1,5.5,1.8,virginica
-6.0,3.0,4.8,1.8,virginica
-6.9,3.1,5.4,2.1,virginica
-6.7,3.1,5.6,2.4,virginica
-6.9,3.1,5.1,2.3,virginica
-5.8,2.7,5.1,1.9,virginica
-6.8,3.2,5.9,2.3,virginica
-6.7,3.3,5.7,2.5,virginica
-6.7,3.0,5.2,2.3,virginica
-6.3,2.5,5.0,1.9,virginica
-6.5,3.0,5.2,2.0,virginica
-6.2,3.4,5.4,2.3,virginica
-5.9,3.0,5.1,1.8,virginica
+5.1,3.5,1.4,0.2,0
+4.9,3.0,1.4,0.2,0
+4.7,3.2,1.3,0.2,0
+4.6,3.1,1.5,0.2,0
+5.0,3.6,1.4,0.2,0
+5.4,3.9,1.7,0.4,0
+4.6,3.4,1.4,0.3,0
+5.0,3.4,1.5,0.2,0
+4.4,2.9,1.4,0.2,0
+4.9,3.1,1.5,0.1,0
+5.4,3.7,1.5,0.2,0
+4.8,3.4,1.6,0.2,0
+4.8,3.0,1.4,0.1,0
+4.3,3.0,1.1,0.1,0
+5.8,4.0,1.2,0.2,0
+5.7,4.4,1.5,0.4,0
+5.4,3.9,1.3,0.4,0
+5.1,3.5,1.4,0.3,0
+5.7,3.8,1.7,0.3,0
+5.1,3.8,1.5,0.3,0
+5.4,3.4,1.7,0.2,0
+5.1,3.7,1.5,0.4,0
+4.6,3.6,1.0,0.2,0
+5.1,3.3,1.7,0.5,0
+4.8,3.4,1.9,0.2,0
+5.0,3.0,1.6,0.2,0
+5.0,3.4,1.6,0.4,0
+5.2,3.5,1.5,0.2,0
+5.2,3.4,1.4,0.2,0
+4.7,3.2,1.6,0.2,0
+4.8,3.1,1.6,0.2,0
+5.4,3.4,1.5,0.4,0
+5.2,4.1,1.5,0.1,0
+5.5,4.2,1.4,0.2,0
+4.9,3.1,1.5,0.1,0
+5.0,3.2,1.2,0.2,0
+5.5,3.5,1.3,0.2,0
+4.9,3.1,1.5,0.1,0
+4.4,3.0,1.3,0.2,0
+5.1,3.4,1.5,0.2,0
+5.0,3.5,1.3,0.3,0
+4.5,2.3,1.3,0.3,0
+4.4,3.2,1.3,0.2,0
+5.0,3.5,1.6,0.6,0
+5.1,3.8,1.9,0.4,0
+4.8,3.0,1.4,0.3,0
+5.1,3.8,1.6,0.2,0
+4.6,3.2,1.4,0.2,0
+5.3,3.7,1.5,0.2,0
+5.0,3.3,1.4,0.2,0
+7.0,3.2,4.7,1.4,1
+6.4,3.2,4.5,1.5,1
+6.9,3.1,4.9,1.5,1
+5.5,2.3,4.0,1.3,1
+6.5,2.8,4.6,1.5,1
+5.7,2.8,4.5,1.3,1
+6.3,3.3,4.7,1.6,1
+4.9,2.4,3.3,1.0,1
+6.6,2.9,4.6,1.3,1
+5.2,2.7,3.9,1.4,1
+5.0,2.0,3.5,1.0,1
+5.9,3.0,4.2,1.5,1
+6.0,2.2,4.0,1.0,1
+6.1,2.9,4.7,1.4,1
+5.6,2.9,3.6,1.3,1
+6.7,3.1,4.4,1.4,1
+5.6,3.0,4.5,1.5,1
+5.8,2.7,4.1,1.0,1
+6.2,2.2,4.5,1.5,1
+5.6,2.5,3.9,1.1,1
+5.9,3.2,4.8,1.8,1
+6.1,2.8,4.0,1.3,1
+6.3,2.5,4.9,1.5,1
+6.1,2.8,4.7,1.2,1
+6.4,2.9,4.3,1.3,1
+6.6,3.0,4.4,1.4,1
+6.8,2.8,4.8,1.4,1
+6.7,3.0,5.0,1.7,1
+6.0,2.9,4.5,1.5,1
+5.7,2.6,3.5,1.0,1
+5.5,2.4,3.8,1.1,1
+5.5,2.4,3.7,1.0,1
+5.8,2.7,3.9,1.2,1
+6.0,2.7,5.1,1.6,1
+5.4,3.0,4.5,1.5,1
+6.0,3.4,4.5,1.6,1
+6.7,3.1,4.7,1.5,1
+6.3,2.3,4.4,1.3,1
+5.6,3.0,4.1,1.3,1
+5.5,2.5,4.0,1.3,1
+5.5,2.6,4.4,1.2,1
+6.1,3.0,4.6,1.4,1
+5.8,2.6,4.0,1.2,1
+5.0,2.3,3.3,1.0,1
+5.6,2.7,4.2,1.3,1
+5.7,3.0,4.2,1.2,1
+5.7,2.9,4.2,1.3,1
+6.2,2.9,4.3,1.3,1
+5.1,2.5,3.0,1.1,1
+5.7,2.8,4.1,1.3,1
+6.3,3.3,6.0,2.5,3
+5.8,2.7,5.1,1.9,3
+7.1,3.0,5.9,2.1,3
+6.3,2.9,5.6,1.8,3
+6.5,3.0,5.8,2.2,3
+7.6,3.0,6.6,2.1,3
+4.9,2.5,4.5,1.7,3
+7.3,2.9,6.3,1.8,3
+6.7,2.5,5.8,1.8,3
+7.2,3.6,6.1,2.5,3
+6.5,3.2,5.1,2.0,3
+6.4,2.7,5.3,1.9,3
+6.8,3.0,5.5,2.1,3
+5.7,2.5,5.0,2.0,3
+5.8,2.8,5.1,2.4,3
+6.4,3.2,5.3,2.3,3
+6.5,3.0,5.5,1.8,3
+7.7,3.8,6.7,2.2,3
+7.7,2.6,6.9,2.3,3
+6.0,2.2,5.0,1.5,3
+6.9,3.2,5.7,2.3,3
+5.6,2.8,4.9,2.0,3
+7.7,2.8,6.7,2.0,3
+6.3,2.7,4.9,1.8,3
+6.7,3.3,5.7,2.1,3
+7.2,3.2,6.0,1.8,3
+6.2,2.8,4.8,1.8,3
+6.1,3.0,4.9,1.8,3
+6.4,2.8,5.6,2.1,3
+7.2,3.0,5.8,1.6,3
+7.4,2.8,6.1,1.9,3
+7.9,3.8,6.4,2.0,3
+6.4,2.8,5.6,2.2,3
+6.3,2.8,5.1,1.5,3
+6.1,2.6,5.6,1.4,3
+7.7,3.0,6.1,2.3,3
+6.3,3.4,5.6,2.4,3
+6.4,3.1,5.5,1.8,3
+6.0,3.0,4.8,1.8,3
+6.9,3.1,5.4,2.1,3
+6.7,3.1,5.6,2.4,3
+6.9,3.1,5.1,2.3,3
+5.8,2.7,5.1,1.9,3
+6.8,3.2,5.9,2.3,3
+6.7,3.3,5.7,2.5,3
+6.7,3.0,5.2,2.3,3
+6.3,2.5,5.0,1.9,3
+6.5,3.0,5.2,2.0,3
+6.2,3.4,5.4,2.3,3
+5.9,3.0,5.1,1.8,3
diff --git a/src/data_csv/iris2.csv b/src/data_csv/iris2.csv
new file mode 100644
index 0000000000000000000000000000000000000000..ba0ebd24cdaa69caacdc7b95f189f39a7e830e3e
--- /dev/null
+++ b/src/data_csv/iris2.csv
@@ -0,0 +1,151 @@
+sepal_length,sepal_width,petal_length,petal_width,species
+5.1,3.5,1.4,0.2,setosa
+4.9,3.0,1.4,0.2,setosa
+4.7,3.2,1.3,0.2,setosa
+4.6,3.1,1.5,0.2,setosa
+5.0,3.6,1.4,0.2,setosa
+5.4,3.9,1.7,0.4,setosa
+4.6,3.4,1.4,0.3,setosa
+5.0,3.4,1.5,0.2,setosa
+4.4,2.9,1.4,0.2,setosa
+4.9,3.1,1.5,0.1,setosa
+5.4,3.7,1.5,0.2,setosa
+4.8,3.4,1.6,0.2,setosa
+4.8,3.0,1.4,0.1,setosa
+4.3,3.0,1.1,0.1,setosa
+5.8,4.0,1.2,0.2,setosa
+5.7,4.4,1.5,0.4,setosa
+5.4,3.9,1.3,0.4,setosa
+5.1,3.5,1.4,0.3,setosa
+5.7,3.8,1.7,0.3,setosa
+5.1,3.8,1.5,0.3,setosa
+5.4,3.4,1.7,0.2,setosa
+5.1,3.7,1.5,0.4,setosa
+4.6,3.6,1.0,0.2,setosa
+5.1,3.3,1.7,0.5,setosa
+4.8,3.4,1.9,0.2,setosa
+5.0,3.0,1.6,0.2,setosa
+5.0,3.4,1.6,0.4,setosa
+5.2,3.5,1.5,0.2,setosa
+5.2,3.4,1.4,0.2,setosa
+4.7,3.2,1.6,0.2,setosa
+4.8,3.1,1.6,0.2,setosa
+5.4,3.4,1.5,0.4,setosa
+5.2,4.1,1.5,0.1,setosa
+5.5,4.2,1.4,0.2,setosa
+4.9,3.1,1.5,0.1,setosa
+5.0,3.2,1.2,0.2,setosa
+5.5,3.5,1.3,0.2,setosa
+4.9,3.1,1.5,0.1,setosa
+4.4,3.0,1.3,0.2,setosa
+5.1,3.4,1.5,0.2,setosa
+5.0,3.5,1.3,0.3,setosa
+4.5,2.3,1.3,0.3,setosa
+4.4,3.2,1.3,0.2,setosa
+5.0,3.5,1.6,0.6,setosa
+5.1,3.8,1.9,0.4,setosa
+4.8,3.0,1.4,0.3,setosa
+5.1,3.8,1.6,0.2,setosa
+4.6,3.2,1.4,0.2,setosa
+5.3,3.7,1.5,0.2,setosa
+5.0,3.3,1.4,0.2,setosa
+7.0,3.2,4.7,1.4,versicolor
+6.4,3.2,4.5,1.5,versicolor
+6.9,3.1,4.9,1.5,versicolor
+5.5,2.3,4.0,1.3,versicolor
+6.5,2.8,4.6,1.5,versicolor
+5.7,2.8,4.5,1.3,versicolor
+6.3,3.3,4.7,1.6,versicolor
+4.9,2.4,3.3,1.0,versicolor
+6.6,2.9,4.6,1.3,versicolor
+5.2,2.7,3.9,1.4,versicolor
+5.0,2.0,3.5,1.0,versicolor
+5.9,3.0,4.2,1.5,versicolor
+6.0,2.2,4.0,1.0,versicolor
+6.1,2.9,4.7,1.4,versicolor
+5.6,2.9,3.6,1.3,versicolor
+6.7,3.1,4.4,1.4,versicolor
+5.6,3.0,4.5,1.5,versicolor
+5.8,2.7,4.1,1.0,versicolor
+6.2,2.2,4.5,1.5,versicolor
+5.6,2.5,3.9,1.1,versicolor
+5.9,3.2,4.8,1.8,versicolor
+6.1,2.8,4.0,1.3,versicolor
+6.3,2.5,4.9,1.5,versicolor
+6.1,2.8,4.7,1.2,versicolor
+6.4,2.9,4.3,1.3,versicolor
+6.6,3.0,4.4,1.4,versicolor
+6.8,2.8,4.8,1.4,versicolor
+6.7,3.0,5.0,1.7,versicolor
+6.0,2.9,4.5,1.5,versicolor
+5.7,2.6,3.5,1.0,versicolor
+5.5,2.4,3.8,1.1,versicolor
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+5.8,2.7,3.9,1.2,versicolor
+6.0,2.7,5.1,1.6,versicolor
+5.4,3.0,4.5,1.5,versicolor
+6.0,3.4,4.5,1.6,versicolor
+6.7,3.1,4.7,1.5,versicolor
+6.3,2.3,4.4,1.3,versicolor
+5.6,3.0,4.1,1.3,versicolor
+5.5,2.5,4.0,1.3,versicolor
+5.5,2.6,4.4,1.2,versicolor
+6.1,3.0,4.6,1.4,versicolor
+5.8,2.6,4.0,1.2,versicolor
+5.0,2.3,3.3,1.0,versicolor
+5.6,2.7,4.2,1.3,versicolor
+5.7,3.0,4.2,1.2,versicolor
+5.7,2.9,4.2,1.3,versicolor
+6.2,2.9,4.3,1.3,versicolor
+5.1,2.5,3.0,1.1,versicolor
+5.7,2.8,4.1,1.3,versicolor
+6.3,3.3,6.0,2.5,virginica
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+7.1,3.0,5.9,2.1,virginica
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+7.2,3.6,6.1,2.5,virginica
+6.5,3.2,5.1,2.0,virginica
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+5.7,2.5,5.0,2.0,virginica
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+7.7,3.8,6.7,2.2,virginica
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+7.7,2.8,6.7,2.0,virginica
+6.3,2.7,4.9,1.8,virginica
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+7.2,3.2,6.0,1.8,virginica
+6.2,2.8,4.8,1.8,virginica
+6.1,3.0,4.9,1.8,virginica
+6.4,2.8,5.6,2.1,virginica
+7.2,3.0,5.8,1.6,virginica
+7.4,2.8,6.1,1.9,virginica
+7.9,3.8,6.4,2.0,virginica
+6.4,2.8,5.6,2.2,virginica
+6.3,2.8,5.1,1.5,virginica
+6.1,2.6,5.6,1.4,virginica
+7.7,3.0,6.1,2.3,virginica
+6.3,3.4,5.6,2.4,virginica
+6.4,3.1,5.5,1.8,virginica
+6.0,3.0,4.8,1.8,virginica
+6.9,3.1,5.4,2.1,virginica
+6.7,3.1,5.6,2.4,virginica
+6.9,3.1,5.1,2.3,virginica
+5.8,2.7,5.1,1.9,virginica
+6.8,3.2,5.9,2.3,virginica
+6.7,3.3,5.7,2.5,virginica
+6.7,3.0,5.2,2.3,virginica
+6.3,2.5,5.0,1.9,virginica
+6.5,3.0,5.2,2.0,virginica
+6.2,3.4,5.4,2.3,virginica
+5.9,3.0,5.1,1.8,virginica