--- a/plotting-data/slides.org	Thu Oct 28 13:19:28 2010 +0530
+++ b/plotting-data/slides.org	Thu Oct 28 15:14:40 2010 +0530
@@ -58,7 +58,7 @@
 
   : In[]: plot(L,t,o)
 
-* Adding an Error Column 
+* Adding Error 
 
 
   |   L |    T | /Delta L | /Delta T |
@@ -75,10 +75,7 @@
  
 * Plotting Error bar 
   
-  : In[]: delta_L= [0.08,0.09,0.07,0.05,0.16,
-  :                0.00,0.06,0.06,0.01]
-  : In[]: delta_T= [0.04,0.08,0.11,0.05,0.03,
-  :                0.03,0.01,0.07,0.01]
+  : In[]: errorbar(L,tsquare,xerr=delta_L, yerr=delta_T,
+  :                fmt='b.')
 
-