Accessing model properties that aren't defined explicitly

[RTomsett]

Hi Neuron folks,

I'm interested in finding the conductances between sections in my model. Is there an easy was to get at this value in NEURON without having to calculate it myself from axial resistance and section lengths & diameters? So far I've been calculating these values by hand, then checking by separating sections and reconnecting with gap junction mechanisms of equivalent conductance, but this seems a little long-winded.

Many thanks,

Richard

[ted]

I'm interested in finding the conductances between sections in my model.
. . .
So far I've been calculating these values by hand, then checking by separating sections and reconnecting with gap junction mechanisms of equivalent conductance

Why are you doing this? What are you trying to accomplish?

[RTomsett]

It's mainly for when copying models to other simulators where compartments are dealt with separately and coupled with a conductance (e.g. Brian). Lots of useful models already implemented in Neuron so would be handy to be able to get at the coupling conductance without having to calculate it every time from axial resistance and compartment length and diameter. It's not a huge problem as it's not hard to calculate, but could save a bit of time if there's an easy way of getting it from Neuron.

[ted]

ri will do what you want. Read about it in the Programmer's Reference
http://www.neuron.yale.edu/neuron/stati ... ry.html#ri

[RTomsett]

Ah, fantastic. Sorry, must have missed it when I was looking through the Programmer's Reference.