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79 about them, later. |
79 about them, later. |
80 |
80 |
81 Now, let us use the ``loadtxt`` command to read a file that contains |
81 Now, let us use the ``loadtxt`` command to read a file that contains |
82 two columns of data, ``pendulum.txt``. This file contains the length |
82 two columns of data, ``pendulum.txt``. This file contains the length |
83 of the pendulum in the first column and the corresponding time period |
83 of the pendulum in the first column and the corresponding time period |
84 in the second. |
84 in the second. Note that ``loadtxt`` needs both the columns to have |
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85 equal number of rows. |
85 |
86 |
86 .. Following is an exercise that you must do. |
87 .. Following is an exercise that you must do. |
87 |
88 |
88 .. %%1%% Use the ``cat`` command to view the contents of this file. |
89 .. %%1%% Use the ``cat`` command to view the contents of this file. |
89 |
90 |
137 |
138 |
138 {{{ show the slide with loadtxt --- other features }}} |
139 {{{ show the slide with loadtxt --- other features }}} |
139 |
140 |
140 In this tutorial, we have learnt the basic use of the ``loadtxt`` |
141 In this tutorial, we have learnt the basic use of the ``loadtxt`` |
141 command, which is capable of doing a lot more than we have used it for |
142 command, which is capable of doing a lot more than we have used it for |
142 until now, for example |
143 until now. Let us look at an example, but before that do this |
143 |
144 exercise. |
144 Following is an exercise that you must do. |
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145 |
145 |
146 %%1%% Read the file ``pendulum_semicolon.txt`` which contains the same |
146 %%1%% Read the file ``pendulum_semicolon.txt`` which contains the same |
147 data as ``pendulum.txt``, but the columns are separated by semi-colons |
147 data as ``pendulum.txt``, but the columns are separated by semi-colons |
148 instead of spaces. Use the IPython help to see how to do this. |
148 instead of spaces. Use the IPython help to see how to do this. |
149 |
149 |