.. _responses-calibration_terms-calibration_data_file-num_config_variables:

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num_config_variables
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Add context to data: number of configuration variables.


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**Specification**

- *Alias:* None

- *Arguments:* INTEGER

- *Default:* 0


**Description**


If there are multiple experiments, there can be different
configuration variables (e.g. experimental settings, boundary
conditions, etc.) per experiment.  See
:dakkw:`responses-calibration_terms-calibration_data` or
:dakkw:`responses-calibration_terms-calibration_data_file`.

During calibration, configuration variables are state variables which
will be passed to the simulation, and are not treated as calibration
parameters.


