loading-data-from-files/script.rst
author Puneeth Chaganti <punchagan@fossee.in>
Fri, 08 Oct 2010 10:47:02 +0530
changeset 247 81bb9a6d7eeb
parent 217 b595f90016c5
child 248 0bad7228029c
permissions -rw-r--r--
Fixed script of loading data from files LO.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
247
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     1
.. Objectives
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     2
.. ----------
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     3
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     4
.. At the end of this tutorial, you will be able to
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     5
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     6
.. + Read data from files, containing a single column of data using the
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     7
..   ``loadtxt`` command.
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     8
.. + Read multiple columns of data, separated by spaces or other
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
     9
..   delimiters.
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    10
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    11
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    12
.. Prerequisites
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    13
.. -------------
217
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    14
247
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    15
.. 1. getting started with ``ipython``
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    16
     
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    17
.. Author              : 
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    18
   Internal Reviewer   : 
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    19
   External Reviewer   :
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    20
   Checklist OK?       : <put date stamp here, if OK> [2010-10-05]
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    21
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    22
Script
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    23
------
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    24
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    25
{{{ Show the slide containing title }}}
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    26
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    27
Hello Friends. Welcome to this tutorial on loading data from files.
217
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    28
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    29
{{{ Screen shows welcome slide }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    30
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    31
We often require to plot points obtained from experimental
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    32
observations. In this tutorial we shall learn to read data from files
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    33
and save it into sequences that can later be used to plot.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    34
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    35
{{{ Show the outline for this tutorial }}} 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    36
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    37
We shall use the ``loadtxt`` command to load data from files. We will
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    38
be looking at how to read a file with multiple columns of data and
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    39
load each column of data into a sequence. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    40
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    41
{{{ switch back to the terminal }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    42
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    43
As usual, let us start IPython, using 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    44
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    45
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    46
  ipython -pylab 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    47
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    48
Now, Let us begin with reading the file primes.txt, which contains
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    49
just a list of primes listed in a column, using the loadtxt command.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    50
The file, in our case, is present in ``/home/fossee/primes.txt``. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    51
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    52
{{{ Navigate to the path in the OS, open the file and show it }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    53
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    54
.. #[punch: do we need a slide for showing the path?]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    55
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    56
.. We use the ``cat`` command to see the contents of this file. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    57
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    58
.. #[punch: should we show the cat command here? seems like a good place
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    59
   to do it] ::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    60
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    61
     cat /home/fossee/primes.txt
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    62
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    63
.. #[Nishanth]: A problem for windows users.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    64
                Should we simply open the file and show them the data
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    65
                so that we can be fine with GNU/Linux ;) and windows?
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    66
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    67
Now let us read this list into the variable ``primes``.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    68
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    69
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    70
  primes = loadtxt('/home/fossee/primes.txt')
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    71
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    72
``primes`` is now a sequence of primes, that was listed in the file,
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    73
``primes.txt``.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    74
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    75
We now type, ``print primes`` to see the sequence printed.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    76
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    77
We observe that all of the numbers end with a period. This is so,
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    78
because these numbers are actually read as ``floats``. We shall learn
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    79
about them, later.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    80
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    81
Now, let us use the ``loadtxt`` command to read a file that contains
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    82
two columns of data, ``pendulum.txt``. This file contains the length
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    83
of the pendulum in the first column and the corresponding time period
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    84
in the second.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    85
247
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    86
.. Following is an exercise that you must do. 
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    87
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    88
.. %%1%% Use the ``cat`` command to view the contents of this file.
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    89
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
    90
.. Please, pause the video here. Do the exercise and then continue. 
217
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    91
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    92
This is how we look at the contents of the file, ``pendulum.txt``
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    93
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    94
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    95
  cat /home/fossee/pendulum.txt
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    96
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    97
.. #[Nishanth]: The first column is L values and second is T values
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    98
                from a simle pelculum experiment.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    99
                Since you are using the variable names later in the
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   100
                script.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   101
                Not necessary but can be included also.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   102
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   103
Let us, now, read the data into the variable ``pend``. Again, it is
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   104
assumed that the file is in ``/home/fossee/``
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   105
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   106
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   107
  pend = loadtxt('/home/fossee/pendulum.txt')
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   108
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   109
Let us now print the variable ``pend`` and see what's in it. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   110
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   111
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   112
  print pend
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   113
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   114
Notice that ``pend`` is not a simple sequence like ``primes``. It has
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   115
two sequences, containing both the columns of the data file. Let us
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   116
use an additional argument of the ``loadtxt`` command, to read it into
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   117
two separate, simple sequences.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   118
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   119
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   120
  L, T = loadtxt('/home/fossee/pendulum.txt', unpack=True)
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   121
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   122
.. #[Nishanth]: It has a sequence of items in which each item contains
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   123
                two values. first is l and second is t
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   124
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   125
Let us now, print the variables L and T, to see what they contain.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   126
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   127
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   128
  print L
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   129
  print T
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   130
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   131
.. #[Nishanth]: Stress on ``unpack=True`` ??
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   132
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   133
Notice, that L and T now contain the first and second columns of data
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   134
from the data file, ``pendulum.txt``, and they are both simple
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   135
sequences. ``unpack=True`` has given us the two columns in to two
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   136
separate sequences instead of one complex sequence. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   137
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   138
{{{ show the slide with loadtxt --- other features }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   139
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   140
In this tutorial, we have learnt the basic use of the ``loadtxt``
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   141
command, which is capable of doing a lot more than we have used it for
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   142
until now, for example
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   143
247
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   144
Following is an exercise that you must do. 
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   145
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   146
%%1%% Read the file ``pendulum_semicolon.txt`` which contains the same
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   147
data as ``pendulum.txt``, but the columns are separated by semi-colons
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   148
instead of spaces. Use the IPython help to see how to do this. 
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   149
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   150
Please, pause the video here. Do the exercise and then continue. 
217
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   151
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   152
{{{ switch back to the terminal }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   153
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   154
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   155
  L, T = loadtxt('/home/fossee/pendulum_semicolon.txt', unpack=True, delimiter=';')
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   156
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   157
  print L
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   158
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   159
  print T
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   160
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   161
This brings us to the end of this tutorial. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   162
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   163
{{{ show the summary slide }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   164
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   165
You should now be able to do the following, comfortably. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   166
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   167
  + Read data from files, containing a single column of data using the
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   168
    ``loadtxt`` command.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   169
  + Read multiple columns of data, separated by spaces or other
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   170
    delimiters.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   171
247
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   172
{{{ Show the "sponsored by FOSSEE" slide }}}
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   173
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   174
This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India
217
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   175
247
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   176
Hope you have enjoyed and found it useful.
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   177
Thank you!
81bb9a6d7eeb Fixed script of loading data from files LO.
Puneeth Chaganti <punchagan@fossee.in>
parents: 217
diff changeset
   178