use greys for heatmap cmap

app.py

@@ -90,7 +90,7 @@ def prepare_heatmap_data(data):
     return heatmap_data
 
 
-def plot_emotion_heatmap(heatmap_data, cmap="viridis"):
+def plot_emotion_heatmap(heatmap_data, cmap="Greys_r"):
     heatmap_data = heatmap_data.T
 
     fig = plt.figure(figsize=(len(heatmap_data.columns) * 0.5 + 4, len(heatmap_data.index) * 0.5 + 2))
@@ -108,7 +108,7 @@ def plot_emotion_heatmap(heatmap_data, cmap="viridis"):
 
     plt.xlabel("Emotions")
     plt.ylabel("Sentences")
-    plt.xticks(rotation=0, ha='right')
+    plt.xticks(rotation=0, ha='center')
     plt.yticks(rotation=0)
     plt.tight_layout()