diff --git a/JFSphoto.py b/JFSphoto.py
index d70757a..2a93835 100644
--- a/JFSphoto.py
+++ b/JFSphoto.py
@@ -13,7 +13,7 @@ import matplotlib.pyplot as plt
 #matplotlib.use("TkAgg")
 from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
 from matplotlib.figure import Figure
-from numpy import arange, sin, pi
+from numpy import arange, sin, pi,cos
 ####################################### object
 
 class Jfsphoto (object):
@@ -325,4 +325,12 @@ class Jfsphoto (object):
         win.wait_window()
 
     def look(self):
-        print(self.ok.get())
\ No newline at end of file
+        #print(self.ok.get())
+        self.ax1.clear()
+        if self.ok.get()==1:
+            self.df.plot(x = 'nmscale',y = 'p1', color='red',linewidth=0.6,ax=self.ax1)
+        else:
+            t = arange(0.0, 3.0, 0.01)
+            s = sin(2*pi*t)
+            self.ax1.plot(t, s, linewidth=0.6)
+        self.canvas.draw()
\ No newline at end of file