config surface contour levels

mahdis-z · mahdis-z · commit c205bba91986 · 2019-11-27T15:20:48.000-05:00
diff --git a/python/3d-surface-plots.md b/python/3d-surface-plots.md
@@ -76,7 +76,35 @@ fig.update_layout(title='Mt Bruno Elevation', autosize=False,
 
 fig.show()
 ```
+#### Configure Surface Contour Levels
+This example shows how to slice the surface graph on the desired position for each of x, y and z axis. [contours.x.start](https://plot.ly/python/reference/#surface-contours-x-start) sets the starting contour level value, `end` sets the end of it, and `size` sets the step between each contour level. 
 
+```python
+import plotly.graph_objects as go
+
+fig = go.Figure(go.Surface(
+    contours = {
+        "x": {"show": True, "start": 1.5, "end": 2, "size": 0.04},
+        "z": {"show": True, "start": 0.5, "end": 0.8, "size": 0.05}
+    },
+    x = [1,2,3,4,5],
+    y = [1,2,3,4,5],
+    z = [
+        [0, 1, 0, 1, 0],
+        [1, 0, 1, 0, 1],
+        [0, 1, 0, 1, 0],
+        [1, 0, 1, 0, 1],
+        [0, 1, 0, 1, 0]
+    ]))
+fig.update_layout(
+        scene = {
+            "xaxis": {"nticks": 20},
+            "zaxis": {"nticks": 4},
+            'camera_eye': {"x": 0, "y": -1, "z": 0.5},
+            "aspectratio": {"x": 1, "y": 1, "z": 0.2}
+        })
+fig.show()
+```
 #### Multiple 3D Surface Plots
 
 ```python
