# HG changeset patch
# User Nishanth <nishanth@fossee.in>
# Date 1285223076 -19800
# Node ID 3a839dca2bdb22728b2561b425cfe7e0436f989e
# Parent  08b2cb94c57c0f6730af3bb603a83b6fa746b936
reviewed loading_data_from_files

diff -r 08b2cb94c57c -r 3a839dca2bdb loading-data-from-files.rst
--- a/loading-data-from-files.rst	Thu Sep 23 11:00:44 2010 +0530
+++ b/loading-data-from-files.rst	Thu Sep 23 11:54:36 2010 +0530
@@ -12,8 +12,10 @@
 what we do most often. We often require to plot points obtained from
 experimental observations.
 
-#[punch: the initial part of the paragraph may be removed, to make
-this a more generic LO?]
+.. #[punch: the initial part of the paragraph may be removed, to make
+    this a more generic LO?]
+
+.. #[Nishanth]: The paragraph can be removed.
 
 In this tutorial we shall learn to read data from files and save it
 into sequences that can later be used to plot.
@@ -24,6 +26,9 @@
 be looking at how to get multiple columns of data into multiple
 sequences.
 
+.. #[Nishanth]: can be "How to read a file with multiple columns of
+                data and load each column of data into a sequence."
+
 {{{ switch back to the terminal }}}
 
 As usual, let us start IPython, using 
@@ -35,7 +40,7 @@
 just a list of primes listed in a column, using the loadtxt command.
 The file, in our case, is present in ``/home/fossee/primes.txt``.
 
-#[punch: do we need a slide for showing the path?]
+.. #[punch: do we need a slide for showing the path?]
 
 We use the ``cat`` command to see the contents of this file. 
 
@@ -44,6 +49,10 @@
 
   cat /home/fossee/primes.txt
 
+.. #[Nishanth]: A problem for windows users.
+                Should we simply open the file and show them the data
+                so that we can be fine with GNU/Linux ;) and windows?
+
 Now let us read this list into the variable ``primes``.
 ::
 
@@ -71,6 +80,12 @@
 
   cat /home/fossee/pendulum.txt
 
+.. #[Nishanth]: The first column is L values and second is T values
+                from a simle pelculum experiment.
+                Since you are using the variable names later in the
+                script.
+                Not necessary but can be included also.
+
 Let us, now, read the data into the variable ``pend``. Again, it is
 assumed that the file is in ``/home/fossee/``
 ::
@@ -90,12 +105,17 @@
 
   L, T = loadtxt('/home/fossee/pendulum.txt', unpack=True)
 
+.. #[Nishanth]: It has a sequence of items in which each item contains
+                two values. first is l and second is t
+
 Let us now, print the variables L and T, to see what they contain.
 ::
 
   print L
   print T
 
+.. #[Nishanth]: Stress on ``unpack=True`` ??
+
 Notice, that L and T now contain the first and second columns of data
 from the data file, ``pendulum.txt``, and they are both simple
 sequences.
@@ -115,12 +135,14 @@
 {{{ switch back to the terminal }}}
 ::
 
-  L, T = loadtxt('/home/fossee/pendulum.txt', unpack``True, delimiter``';')
+  L, T = loadtxt('/home/fossee/pendulum.txt', unpack=True, delimiter=';')
 
   print L
 
   print T
 
+.. #[Nishanth]: L, T = loadtxt('/home/fossee/pendulum_semicolon.txt', ...)
+
 This brings us to the end of this tutorial. 
 
 {{{ show the summary slide }}}
diff -r 08b2cb94c57c -r 3a839dca2bdb progress.org
--- a/progress.org	Thu Sep 23 11:00:44 2010 +0530
+++ b/progress.org	Thu Sep 23 11:54:36 2010 +0530
@@ -8,7 +8,7 @@
 | 1.7 LO: | additional features of IPython         |     2 | Nishanth | Amit (Pending)      | Madhu (Pending)     |
 | 1.8 LO: | module level assessment                |     3 | Madhu    |                     |                     |
 |---------+----------------------------------------+-------+----------+---------------------+---------------------|
-| 2.2 LO: | loading data from files                |     3 | Punch    |                     |                     |
+| 2.2 LO: | loading data from files                |     3 | Punch    | Nishanth (Done)     | Anoop (Pending)     |
 | 2.3 LO: | plotting the data                      |     3 | Amit     | Anoop (Pending)     | Punch (Pending)     |
 | 2.4 LO: | other types of plots                   |     3 | Anoop    |                     |                     |
 | 2.5 LO: | module level assessment                |     3 | Nishanth |                     |                     |