2 

     2 

     3 In the previous tutorial we learnt how to read data from a file and plot it.

     3 In the previous tutorial we learnt how to read data from a file and plot it.

     4 We used 'for' loops and lists to get data in the desired format.

     4 We used 'for' loops and lists to get data in the desired format.

     5 IPython -Pylab also provides a function called 'loadtxt' that can get us the same data in the desired format without much hustle.

     5 IPython -Pylab also provides a function called 'loadtxt' that can get us the same data in the desired format without much hustle.

     6 

     6 

     7 We know that, pendulum.txt contains two columns, with length being first and time period is second column, so to get both columns in two separate variables we type

     8 We know that, pendulum.txt contains two columns, with length being first and time period is second column, so to get both columns in two separate variables we type

     8 

     9 

     9 l, t = loadtxt('pendulum.txt', unpack=True)

    10 l, t = loadtxt('pendulum.txt', unpack=True)

    10 

    11 

    11 (unpack = True) will give us all of first column(length) in l and second column(time) in t

    12 (unpack = True) will give us all of first column(length) in l and second column(time) in t