Re: [Pcsim-users] plot

[Natschläger T. <Tho...@sc...>]

Hi Mathieu,

please have a look at the example

http://www.lsm.tugraz.at/pcsim/examples/spatial_inh_exc_populations.py

(which is also included in the distribution) which shows how to use a *population of input neurons* connected via a ConnectionProjection to the pool of neurons.
This will allow you to access the individual connections.

Best Regards

  -thomas (natschlaeger)


-----Original Message-----
From: Mathieu Dubois [mailto:mat...@li...]
Sent: Thu 6/26/2008 6:03 PM
To: pcs...@li...
Cc: Natschläger Thomas
Subject: Re: [Pcsim-users] plot
 
Hi Thomas, Hi Dejan,

Thank you very much for the helpful information. I'm close to get the 
kind of plot that I want.

Nevertheless, I still have some problems. Let me explain.

I want to build (and plot) the same LSM than in [1] (very similar to the 
one given in the Circuit-Tool tutorial).
I have created the liquid neurons as a spatial population with 2 families:
liquid_nrn_popul = SpatialFamilyPopulation( net, [ exc_nrn_factory, 
inh_nrn_factory ], RatioBasedFamilies( EXC_INH_Ratio  ), 
CuboidIntegerGrid3D(LIQUID_SIZE, LIQUID_ORIGIN) );
so I can make the connections inside the liquid with a 
ConnectionsProjection and draw those synapses with the help you gave me.

But for connecting (for instance) the input neurons to the liquid I use 
net.connect (as in the examples) so I cannot use a ConnectionsProjection 
(each input neuron is connected to the three liquid neurons at the same 
altitude).

I think that I can define a new sub-population in the liquid with the 
function subset (and therefore  use a ConnectionsProjection) but I 
cannot figure out how to do that with the online help.

So my question is: How to define a subpopulation?

Thanks in advance,
Mathieu

[1] "Imitation Learning with spiking networks and real-world devices", 
H. Burgsteiner, Engineering Applications of AI, 19, 741-752, 2006

Natschläger Thomas wrote:
> Hi Mathieu,
>
> please find attached an example which shows how to extract such information.
>
> Regards
>
>   -thomas natschlaeger
>
>
> -----Original Message-----
> From: pcs...@li... on behalf of Mathieu Dubois
> Sent: Tue 6/24/2008 6:20 PM
> To: pcs...@li...
> Subject: [Pcsim-users] plot
>  
> Hi,
>
> I would like to plot the networks created with pcsim (with Gnuplot.py).
>
> I know how to access the neurons (in fact the sub-populations created  
> with SpatialSimObjectPopulation) but I don't know how to access the 
> synapses in the network.
> Furthermore how can I find the source and the destination of a synapse?
>
> Thanks in advance,
> Mathieu
>
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