NESim Help

Neural Engineering Simulator (NESim) Help
Examples There are several examples that can be found in the NeuronData directory of the main NESim directory. These are described briefly below. 1. SingleEnsemble This example is the simplest possible system you can define in NESim. It consists of a single ensemble with one input. It is described in detail here. 2. SimplestCircuit This example is a simple communication channel. An encoded scalar signal is sent from one population to another. 3. SimpleFunction This example demonstrates the kinds of functions that can be computed. It is described in detail here. 4. SimpleFunction2 This example demonstrates how multiple functions can be decoded from a single population (W). 5. SimpleHighD This demonstrates a slightly more complex system that includes 4 populations. One of those represents a 6-dimensional space and is driven by two other 3-dimensional populations. 6. AddVectors This demonstrates simple 2D vector addition. 7. Multiplication This shows how to implement the multiplication of two variables. This demonstrates techniques useful for computing nonlinear transformations. 8. Polynomial This shows how to compute polynomials of an encoded signal. It is described in detail here. 9. Polynomial2 This shows how to compute two different polynomials from one population (basically a combination of 8. and 4. above). 10. Integration This implements a simple neural integrator. This is not a particularly good integrator, but it allows you to play with the various simulation parameters, and try different populations of neurons to see the effects that these have. The external signal should be a step functions. 11. ControlledIntegration This demonstrates a controllable neural integrator. The comments at the beginning of the .txt file describe how to run this example. 12. Oscillator This demonstrates a simple oscillator. The external signals should be zero and a step input. Because this is a numerical oscillator, the amplitude will increase exponentially. To minimize this effect, the step size can be reduced. However, the neural solution (though not the direct solution) will reach a maximum amplitude of 1 because it can't represent values larger than this. 13. Otolith This is a more complex example that is not included with the standard NESim code. It can be downloaded here (33MB). This simulation includes about 5000 neurons that perform a computation that is thought to take place in parts of the vestibular system (see the book for details).