Update app.py

app.py

@@ -899,7 +899,7 @@ with ui.navset_card_tab(id="tab"):
         ui.panel_title("Kmer Distribution")
         with ui.layout_columns():
             with ui.card():
-                ui.input_slider("kmer", "kmer", 0, 10, 5)
+                ui.input_slider("kmer", "kmer", 0, 10, 0)
                 ui.input_slider("top_k", "top:", 0, 1000, 15)
                 
                 ui.input_selectize(  
@@ -917,7 +917,7 @@ with ui.navset_card_tab(id="tab"):
             top_k = input.top_k()
             fig = None
             mpl.rcParams.update(mpl.rcParamsDefault)
-            if input.plot_type() == "count":
+            if input.plot_type() == "count" and input.kmer() > 0:
                 df = df[df['k'] == k]
                 df = df.head(top_k)
                 fig, ax = plt.subplots()
@@ -926,7 +926,7 @@ with ui.navset_card_tab(id="tab"):
                 ax.set_xlabel("K-mer")
                 ax.set_ylabel("Count")
                 ax.set_xticklabels(df['kmer'], rotation=90)
-            if input.plot_type() == "percentage":
+            if input.plot_type() == "percentage" and input.kmer() > 0:
                 df = df[df['k'] == k]
                 df = df.head(top_k)
                 fig, ax = plt.subplots()