Tutorial example 1
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Let us start from the most popular case where we have a couple of data (x,y) type. When you want to plot one dimensional graph from (x,y) data by taking the first column as x-axis and the second one as y-axis, it is enough to insert one line of ANGEL command before the date as follows  [1]_,

.. rubric:: List 1.1  • Input of tutorial example 1
   :name: list-1-1
   :class: angel-list-caption

.. code-block:: text

        1:  H: X     Y            <-------- Insert
        2:     0.5   10
        3:     3     40
        4:     5     20
        5:     7     60
        6:     9     30

The first line, “\ ``H: X    Y``", is a command line of ANGEL which makes one dimensional plot according to the following lines which include two data, the first column is x data and the second one is y data. ANGEL processes this file and creates an EPS file, which is shown bellow, where the size of paper is A4 in default.

.. figure:: assets/fig101.png
   :name: fig-intro-1
   :width: 386.8pt
   :align: center
   :class: responsive-figure

   Tutorial example 1

Only by List 1.1, you can get the above graph in which ANGEL automatically determines the scale of x and y axis, number, text and margin by the default.

.. [1]
   In the case of data list or prgram list, we put the line number on the head of line.