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On 12/1/2004 Maciej Lazarewicz <mlazarew@seas.upenn.edu> wrote: A year or so ago, with help of Dr. Hines, we started to develop the NEURON code capable of using multiple processors for simulations of large single cell models or network of cells connected by gap junctions. We got the first working im...

On 12/1/2004 Ulf Knoblich <knoblich@csail.mit.edu> asked: we're thinking about simulating a large network of "biological" neurons (as opposed to "artificial" ones), i.e. neurons with membrane currents etc. Has anyone ever tried to distribute computations over a cluster using NEUR...

A variable must be declared to be an objref before it can be used as an objref. Objrefs must be declared at the top level of the interpreter. Statements that appear within a proc or func are not at the top level of the interpreter. So this works objref fap proc foo() { fap = new Classname() } but th...

On 11/30/2005 Michael Hines <michael.hines@yale.edu> replied: I generally use the shell feature called a "here" script. i.e nrniv funcdef.hoc - << here foo(p1, p2) here The sh man page states: Here Documents This type of redirection instructs the shell to read input from the current source...

On 11/30/2004 Jose Ambros-Ingerson <jose@kiubo.net> wrote: It would be very convenient to be able to run nrniv from a shell script and be able to execute a function call. A line in this script would look something like: $ nrniv funcdef.hoc -e "foo(p1,p2)" which would mean "load file f...

There are several ways to make pseudorandom sequences available to mechanisms. The "best" way depends on the details of what you want to do. For example, if all you need is a point source of noisy current, there's no need to write any NMODL code at all. Just use the Random class's play() m...

On 4/21/2005 Luca Finelli <lfinelli@salk.edu> asked:
What's the best way to have a random number generator available
inside a mod file (can one use the syntax for Random in hoc files?).

This stuff libpvm [pid3009] /tmp/pvmd.501: No such file or directory libpvm [pid3009] /tmp/pvmd.501: No such file or directory libpvm [pid3009] /tmp/pvmd.501: No such file or directory libpvm [pid3009]: pvm_parent(): Can't contact local daemon is irrelevant unless you are using PVM to implement a wo...

I get the following error when trying to save a vector to a file. first instance of A first instance of k1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 libpvm [pid3009] /tmp/pvmd.501: No such file or directory libpvm [pid3009] /tmp/pvmd.501: No such file or directory libpvm [pid3009] /tmp/pvmd.501: No such file ...

If your model has no ion accumulation mechanisms (diffusion, buffers, transport mechanisms), ionic equilibrium potentials are treated as constants and are specified with simple assignment statements. When there is an ion accumulation mechanism, the affected ionic species becomes a state variable in ...

On 3/31/2005 a NEURON user asked:
How can I control the extracellular environment?

It can contain as many different kinds as you like. If your net has only a few cells, you can do the whole thing with the Network Builder (see tutorial at http://www.neuron.yale.edu/neuron/docs ). If your net has > 5 or 6 cells and many synaptic connections, use the approach described in chapter 11 ...

On 3/31/2005 a NEURON user aked:
Can a network model contain two different kinds of cells?

Import the morphology into the CellBuilder, then use the CellBuilder to specify biophysical properties and spatial discretization (use the d_lambda strategy). Then use the CellBuilder to create a template 1. Management page / Cell Type button 2. Use the Classname button to assign a name to the cell ...

On 3/31/2005 a NEURON user wrote:
I have a model neuron based on a detailed morphometric reconstruction
that I want to use it in a network model. How do I turn this model cell into
a template for a new cell class?