diff --git a/copulogram/Copulogram.py b/copulogram/Copulogram.py
index 7e67154..60941b8 100644
--- a/copulogram/Copulogram.py
+++ b/copulogram/Copulogram.py
@@ -112,7 +112,10 @@ def draw(self,
 
             if quantile_contour_levels is None:
                 copulogram.map_lower(plt.scatter, color=color, alpha=alpha, marker=marker)
-                temp = df_numeric.rank() / self.N * df_numeric.max().values
+                temp = (df_numeric.rank() / self.N)
+                xmaxs = df_numeric.max().values
+                xmins = df_numeric.min().values
+                temp = temp * (xmaxs - xmins) + xmins
                 copulogram.data = temp
                 copulogram = copulogram.map_upper(plt.scatter, color=color, alpha=alpha, marker=marker)
             else:
@@ -140,7 +143,11 @@ def draw(self,
             
             if quantile_contour_levels is None:
                 copulogram.map_lower(sns.scatterplot, alpha=alpha, marker=marker)
-                temp = df_numeric[plotted_cols].rank() / self.N * df_numeric[plotted_cols].max().values
+                #temp = df_numeric[plotted_cols].rank() / self.N * df_numeric[plotted_cols].max().values
+                temp = (df_numeric[plotted_cols].rank() / self.N)
+                xmaxs = df_numeric[plotted_cols].max().values
+                xmins = df_numeric[plotted_cols].min().values
+                temp = temp * (xmaxs - xmins) + xmins
                 temp[hue] = df[hue]
                 copulogram.data = temp
                 copulogram = copulogram.map_upper(sns.scatterplot, alpha=alpha, marker=marker)
diff --git a/examples/figures/ishigami.jpg b/examples/figures/ishigami.jpg
new file mode 100644
index 0000000..a18e8d2
Binary files /dev/null and b/examples/figures/ishigami.jpg differ
diff --git a/examples/figures/wind_waves.jpg b/examples/figures/wind_waves.jpg
index 73f14f0..96427b9 100644
Binary files a/examples/figures/wind_waves.jpg and b/examples/figures/wind_waves.jpg differ
diff --git a/examples/figures/wind_waves_contours.jpg b/examples/figures/wind_waves_contours.jpg
index a5bb156..9cf952b 100644
Binary files a/examples/figures/wind_waves_contours.jpg and b/examples/figures/wind_waves_contours.jpg differ
diff --git a/examples/figures/wind_waves_woutput.jpg b/examples/figures/wind_waves_woutput.jpg
index c922c16..172549b 100644
Binary files a/examples/figures/wind_waves_woutput.jpg and b/examples/figures/wind_waves_woutput.jpg differ
diff --git a/examples/ishigami.py b/examples/ishigami.py
new file mode 100644
index 0000000..67675df
--- /dev/null
+++ b/examples/ishigami.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Copyright (C) EDF 2023
+
+@author: Elias Fekhari
+"""
+import numpy as np
+import pandas as pd
+import openturns as ot 
+import copulogram as cp
+from openturns.usecases import ishigami_function
+
+im = ishigami_function.IshigamiModel()
+size = 5000
+X = im.distributionX.getSample(size)
+Y = im.model(X)
+
+plotting_size = 1000
+data = pd.DataFrame(np.array(X[:plotting_size]), columns=list(X.getDescription()))
+data['Y'] = np.array(Y[:plotting_size])
+copulogram = cp.Copulogram(data)
+copulogram.draw(color='C7', marker='.', alpha=0.5, save_file="figures/ishigami.jpg")