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Miscellaneous
=============
.. hoc:function:: ghk
Syntax:
``ghk(v, ci, co, charge)``
Description:
Return the Goldman-Hodgkin-Katz current (normalized to unit permeability).
Use the present value of celsius.
.. code-block::
none
mA/cm2 = (permeability in cm/s)*ghk(mV, mM, mM, valence)
----
.. hoc:function:: nernst
Syntax:
``nernst(ci, co, charge)``
``nernst("ena" or "nai" or "nao", [x])``
Description:
``nernst(ci, co, charge)``
returns nernst potential. Utilizes the present value of celsius.
``nernst("ena" or "nai" or "nao", [x])``
calculates ``nao/nai = exp(z*ena/RTF)`` for the ionic variable
named in the string.
Celsius, valence, and the other two ionic variables are taken from their
values at the currently accessed section at position x (.5 default).
A hoc error is printed if the ionic species does not exist at this location.
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