[feature] measure performance and save to a file

EDIT: due to a miscalculation of idf this result is no more accurate. See !5 (merged)

Closes #4 (closed)

Measures the performance of the current implementation for diffrerent thresholds.

A theshold is the minimum value for the Selektor (threshold <= simValue <= 1)

output/resultAnalysis.py

+import matplotlib.pyplot as plt
+import pandas as pd
+
+file = "tfidf-2020May-291539"
+
+
+def plotData(data):
+    data.set_index("threshold", inplace=True)
+
+    data.plot()
+    plt.axes().yaxis.grid(True)
+    plt.show()
+
+
+plt.close("all")
+data = pd.read_csv(file + ".csv")\
+    [["threshold", "precision", "recall", "fMeasure", ]]
+
+plotData(data)
+