# HG changeset patch
# User Shantanu <shantanu@fossee.in>
# Date 1270931219 -19800
# Node ID f248e91b1510579a6e8748a36484b7399fc96a12
# Parent  c2634d874e335748f6947be32b27f3cd589112e9
Added changes to 3.1 session script.

diff -r c2634d874e33 -r f248e91b1510 statistics-script
--- a/statistics-script	Sun Apr 11 01:30:44 2010 +0530
+++ b/statistics-script	Sun Apr 11 01:56:59 2010 +0530
@@ -24,7 +24,26 @@
 
 plot(l, tsq, 'o')
 
+Additionally the basic equation for finding Time period of simple pendulum we use equation:
 
+T = 2*pi*sqrt(L/g)
+
+In our case we have t and l already, so to find g value for each element we can simply use:
+
+g = 4*pi^2*L/T^2
+
+g is array with 90 elements, so we take average of all these values to get acceleration due to gravity('g') by
+
+print mean(g)
+
+Mean again is provided by pylab module which calculates average of given set of values.
+There are other handy statistical functions available, such as median, mode, std(for standard deviation) etc.
+
+So in this small session we have covered 'better' way of loading data from text files.
+Why arrays are better choice then lists in some cases, and how they are helpful during some mathematical operations.
+
+Thank you!
+-----------------------------------------------------------------------------------------------------------
 In this tutorial we shall learn how to compute statistics using python.
 We also shall learn how to represent data in the form of pie charts.