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Output
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This chapter describes which variables can be printed out and how.

.. Note::
   
   Since longer model runs can be heavily memory-consuming the general frequency of data-readout can be adjusted in the cofiguration.ini.
   The parameter *data_readout* (in ``rk4input``) indicates on which step the data is read. 1 for every, 2 for every second ...

There are two types of data to print. 

The first type are the primary variables *time* and *temperature*. They are returned directly by the algorithm (for details see :doc:`How to use <howtouse>` or :doc:`RK4 <code/rk4>`.

The second type are secondary variables, such as the albedo or the insolation, which might be of interest to observe. They are stored by the :doc:`Variables <code/variables>` package within the class ``Vars``. 
Most of them are written into a specific array which is labeled as **Read** and callable by::

    from Variables import Vars
    Vars.Read

and contains the following variables::

    Read=[cL,C,F,v,P,Transfer,alpha,BudTransfer,Solar,Noise,Rin,Rout,ExternalOutput,CO2Forcing]

Beneath the variables in the ``Read``-array, there are additional variables which can be printed, for example the following static variables::

    Solar=list
    Area=list
    bounds=list
    latlength=list
    External_time_start=float
    CO2_time_start=float

All of them are callable by::

    from Variables import Vars
    Vars.VARIABLENAME

The description of all output variables is given in chapter :doc:`Variables <code/variables>`.