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.. _predec:
.. _predeclared-variables:
Predeclared Variables
---------------------
.. data:: hoc_ac_
Syntax:
``h.hoc_ac_``
A variable used by the graphical interface to communicate with the
interpreter. It is very volatile. It sometimes holds a value on a
function call. If this value is needed by the user it should be
copied to another variable prior to any other function call.
----
.. data:: hoc_obj_
Syntax:
``h.hoc_obj_[0]``
``h.hoc_obj_[1]``
Description:
When a line on a :class:`Graph` is picked with the :ref:`gui_pickvector` tool
two new :class:`Vector`\ 's are created containing the y and x coordinates of the
line. The y vector is referenced by hoc_obj_[0] and the x vector is
referenced by hoc_obj_[1].
----
.. data:: hoc_cross_x_
Syntax:
``h.hoc_cross_x_``
Description:
X coordinate value of the last :ref:`graph_crosshair` manipulation.
.. seealso::
:ref:`graph_crosshair`
----
.. data:: hoc_cross_y_
Syntax:
``h.hoc_cross_y_``
Description:
Y coordinate value of the last :ref:`graph_crosshair` manipulation.
.. seealso::
:ref:`graph_crosshair`
|
