www.neuron.yale.edu

A flag=2 event sends a flag=1 event. And a flag=1 event sends a flag=1 event. Right, but all events are sent with a proper next_ev time delay, isn't it? This is what seems not to be working when WATCH is present. Is there a way to monitor event generation, delays, and arrivals while the simulation ...

I believe the problem is that every time the voltage changes from vlast by more than 5mV you start a whole new series of flag=1 streams that never ends. And why is that? I can't see it in the code. Did I miss something in the way WATCH works? This is occurring with the fixed step method as well but...

Hi, This is my current iteration: TITLE Mock stochastic voltage-dependent sodium channel : : Written by Patricio Orio, Ago 2009 : NEURON { POINT_PROCESS stNav2 USEION na READ ena WRITE ina RANGE N, No, Po, ina, next_ev, vlast } UNITS { (mA) = (milliamp) (mV) = (millivolt) } PARAMETER { N = 100 gu = ...

Thanks!
I'll try to figure it out and if I succeed I'll post the code.

Thanks a lot for the answer. It's not a big deal to make it a point process, but it's been hard to find good documentation about NET_RECEIVE blocks and WATCH (by 'good' documentation I mean an explanation of the commands in the way it is found for hoc commands in NEURON's help files). Where can I fi...

Hi, This is a topic I take to the surface from time to time. I want to simulate stochastic single channels from nmodl code instead of using the channel builder and the associated hoc code (I'm not going to discuss the reasons of my choice here). I have successfuly written the mod file for this simul...

Now this is funny: * I installed NEURON in a 32-bit WinXP Virtual machine (within my 64-bit environment), and the things works! (i.e., previous commands appear when I press 'UP') * Back in the 64-bit WinXP, I launched the xrvt terminal and again the command history can be properly reviewed. So the p...

Just like it sounds. I press the UP arrow key and I only get a beep or error sound. Sometimes I make preliminary simulations from within the command shell, and re-typing everything may get tedious. Is there some kind of rxvt shell configuration that may be wrong? (something related to keyboard layou...

Hi, After some months, I want to get back to this. I've discovered that there a 64 bit version of mingw: http://mingw-w64.sourceforge.net/. I've compiled it (mingw64, not neuron) under cygwin but I really don't know how to continue. I don't know much about compiling, less about cross compiling and I...

Hi, I'm working with Windows XP x64 edition. I've noticed that neuron runs in 32bit modein this OS, and it is no wonder because of the lack of a native 64-bit cygwin. Because of that, I also assume that I could not compile a native 64-bit version of neuron using cygwin. Is there any other option to ...

Clear as water.
Thanks a lot.

OK, thanks for the tip. Now it works with fixed timestep. Two more questions: 1) Suddenly I realized that the correct way to go should be something like noise = 1(mA/cm2) * normrand(0,D*sqrt(dt)) n' = (-n + noise)/tau i.e., correcting the variance by the dt. Would that make it more appropriate for a...

Hi, I'm trying to study the effect of different kinds of noise in a simple one-compartment model, and I'm having some problems: After succesfully playing with a simple white noise, now I want to model an Ornstein-Uhlenbeck process, which in the practice is a low-pass filtered white noise (isn't it?)...

Why don't you just do something like
instead of 'manually' adding the random value in a separate procedure?

Excellent!!

Thanks a lot.