add req and plt

app.py

@@ -2,6 +2,7 @@ import gradio as gr
 from scipy.optimize import differential_evolution
 import pandas as pd
 import joblib
+import matplotlib.pyplot as plt
 
 # Load trained model
 best_model = joblib.load("xgb_model.pkl")

requirements.txt

@@ -2,4 +2,5 @@ gradio
 pandas
 scipy
 xgboost
-joblib
+joblib
+matplotlib