www.neuron.yale.edu

For the life of me I can't figure out how to prevent the nrniv.exe window from showing. Is it possible to run the executable as a hidden process? I'm running simulations using multiple calls to the executable and the constant popping up of the windows takes over my computer. Thanks!

Jim

Ah, good to know. I had never thought about it but I guess that's why a lot of the function calls I make are constantly printing out ones. Perhaps I should be paying more attention to those occasional zeros and removing some of those curly brackets around my function calls! Although on a related not...

It seems that invalid file references in nrn_load_dll don't throw an error. Is this known/desired? It seems that if the user specifies a file that doesn't exist an error should be thrown ... Thoughts?

Thanks,
Jim

Does adding a "-" at the end work?

http://www.neuron.yale.edu/neuron/stati ... n/hoc.html

I had been trying to implement some of the features of McNeal 1976, the first extracellular stimulation paper in the field. My model was occasionally suggesting inverse recruitment (larger fibers getting recruited first), although the majority of the time smaller diameter fibers had lower thresholds...

A small problem that I found, which if you read the documentation it mentions, is that for x = 0 and x = 1, the nodes have no area. I've changed my stimulation code so that when I am going through a section and for every x in that section, I have the following code: for (x) { if(x != 0 && x ...

Hello all, I'm trying to reproduce a common observation that a larger neuron tends to get activated at a lower current threshold, via extracellular stimulation, than a smaller neuron. Unfortunately I am working with magical neurons that the opposite seems to be the case. Doubting my results and magi...

I have playing around with enough exponential functions lately that I started to wonder where the "vtrap" equation I was using came from. The general form for this equation is: vtrap = x/(exp(x/y) - 1) however as can be easily seen if x/y is 0, or close to zero, then the denominator of the...

Thanks, I just found that function.

For others reference:
I put all the files I needed in a subdirectory "modFiles", used mknrndll, and then the first file I run has the following code.

I'd like to keep my nmodl files in a separate subdirectory and add a path so that while running a hoc file it utilizes the mod files in that subdirectory. Thoughts on how I would implement this? Thanks.

I just figured this out and it wasn't so obvious for me so I though I would share. The following shows how to go about changing a mechanism's parameter in hoc code. NEURON { SUFFIX xyz :More Code } PARAMETER { myparam = 3 } in hoc code you might the have: insert xyz myparam_xyz = 4 The key point her...

Oops, correction. if(test = 0){ print "I won't print because of the assignment" } This would normally run if test had been set to anything besides zero as an if statement evaluates true if not 0 (could be any other number). if(test = 0){ print "I won't print because the variable has b...

It seems that it is possible to create an assignment in an if statement. I think it would be better if a compiler error were thrown instead and if this behavior were not allowed. For example: test = 1 if(test == 0){ print "I didn't print" } if(test = 0){ print "I won't print because o...

I added the following to the code for detecting an error. In hoc code (last line): print "No_Errors!" In Matlab: [status,result] = system('C:\nrn60\bin\nrniv.exe -nobanner runMain.hoc -c quit()'); if ~isempty(findstr('No_Errors!',result)) [do whatever here] else error(result) end In Matlab...

On a basic level one can control neuron in Matlab via (type code in command window): ![path]nrniv.exe -isatty where in my case I used !C:\nrn60\bin\nrniv.exe -isatty However , my goal was to modify parameters in Matlab, initialize values appropriately with parameter variation, then to run the neuron...