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Hi all,
I have the same problem. My model includes channel noise and I received the error “spFactor error: Zero Diagonal” during simulations. I am wondering how the problem can be solved
Thank you

My code works well for single compartment model. But for a multicompartment model in which more than a section includes Kv1 mechanism, it only calculates noise (i.e. z1) for the last segment of the last compartment. I have for sec in h.allsec(): if h.ismembrane('Kv1',sec = sec): for seg in sec.allse...

Thanks a lot. Appreciate it.

Thank you for your help. I appreciate it. I tried to implement what you suggested, and it works. In the following code the callback is a wrapper python function and at each time step, z1 is calculated and transferred to the .mod file. The only problem is that at each time step I want my python code ...

Hi all, Thank you very much for your responses. I am using the fixed step method. The code below is my potassium channel mod file. z1 is the noise and it is POINTER variable. At each time step, I want to have Python calculate z1 using alphan, betan, and n. NEURON { SUFFIX Kv1 USEION k READ ek WRITE ...

Hi Ted, I have a question about functions built into NMODL. I am trying to incorporate channel noise in the Hodgkin-Huxley equations. At each time step, I need to use the singular value decomposition (svd) function. It seems that svd function is not built into NMODL. I am wondering if and how I can ...