27 Additionally the basic equation for finding Time period of simple pendulum we use equation:

    29 T = 2*pi*sqrt(L/g)

    30 

    31 In our case we have t and l already, so to find g value for each element we can simply use:

    32 

    33 g = 4*pi^2*L/T^2

    34 

    35 g is array with 90 elements, so we take average of all these values to get acceleration due to gravity('g') by

    36 

    37 print mean(g)

    38 

    39 Mean again is provided by pylab module which calculates average of given set of values.

    40 There are other handy statistical functions available, such as median, mode, std(for standard deviation) etc.

    41 

    42 So in this small session we have covered 'better' way of loading data from text files.

    43 Why arrays are better choice then lists in some cases, and how they are helpful during some mathematical operations.

    44 

    45 Thank you!

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