Improve layout

frontends/gradio/main.py

@@ -185,6 +185,8 @@ def launch():
                             value=default_x2_range,
                             interactive=True,
                         )
+                    
+                    with gr.Row():
                         x_selection_method = gr.Radio(
                             label="How to select x points",
                             choices=["Grid", "Random"],
@@ -198,10 +200,15 @@ def launch():
                             value=default_sigma,
                             interactive=True,
                         )
-                        nsample = gr.Number(
+
+                    with gr.Row():
+                        nsample = gr.Slider(
                             label="Number of points",
                             value=default_num_points,
                             interactive=True,
+                            minimum=1,
+                            maximum=100,
+                            step=1,
                         )
 
                     with gr.Row():
@@ -229,6 +236,8 @@ def launch():
                             value=default_x2_col,
                             visible=False,
                         )
+                    
+                    with gr.Row():
                         y_col = gr.Number(
                             label="y column index (0-based)",
                             value=default_y_col,