[Pcsim-users] How to make a field recordable?

[Mathieu D. <mat...@li...>]

Hi everybody,

I'm developing a small PCSIM extension (I have carefully followed the 
steps in the HowTo).

I want to define a new class SquashingNeuron which derives from 
LinearNeuron. At each step it should sum the synaptic inputs (like 
LinearNeuron) and apply a squashing function.

The implementation is straightforward (see attachments). Compilation & 
tests went fine.

However (for debugging purpose) I would like to be able to record the 
"linear_sum" public member (which is the linear sum of synaptic inputs - 
result of LinearNeuron::advance(...) see code).

When I try this I get the following error message:

RuntimeError: PCSIM::Exception in function SimObject::findField: SquashingNeuron has no field named linear_sum

Is there something wrong with my code or do I have to do something to 
turn a C++ public member into a PCSIM field?

Interested readers will recognize the kind of squashing function used in 
the p-delta learning rule... which is what I would like to implement.

Thanks in advance,
Mathieu