Memory Input synapse

[ucicelos]

hi guys.

I am having trouble with getting the network train with memory input. I am getting the following error

Exception in thread "Thread-1" java.lang.NullPointerException
        at org.joone.io.MemoryInputTokenizer.nextLine(MemoryInputTokenizer.java:51)
        at org.joone.io.StreamInputSynapse.getStream(StreamInputSynapse.java:197)
        at org.joone.io.StreamInputSynapse.readAll(StreamInputSynapse.java:328)
        at org.joone.io.StreamInputSynapse.fwdGet(StreamInputSynapse.java:121)
        at org.joone.engine.Layer.fireFwdGet(Layer.java:246)
        at org.joone.engine.Layer.fwdRun(Layer.java:1351)
        at org.joone.net.NeuralNet.stepForward(NeuralNet.java:1159)
        at org.joone.net.NeuralNet.fastRun(NeuralNet.java:1113)
        at org.joone.net.NeuralNet.fastRun(NeuralNet.java:1075)
        at org.joone.net.NeuralNet$1.run(NeuralNet.java:1011)
        at java.lang.Thread.run(Thread.java:619)

any pointers toward what i might be doing wrong??

thanks,
Ucicelos

[ferra4models]

Just pointers....

After instantiating a new memory input synapse, you have to still set the input array and also the columns from which to read. So, typically,

// Create a stream input synapse to read the data from a file
StreamInputSynapse streamInputSynapse = new StreamInputSynapse ();
// Configure stream input synapse to get data from some file....

// Create and populate memory input synapse
MemoryInputSynapse inputSynapse = new MemoryInputSynapse ();
inputSynapse.setInputArray ( JooneTools.getDataFromStream ( streamInputSynapse, streamInputSynapse.getFirstRow (), streamInputSynapse.getLastRow (), streamInputSynapse.getFirstCol (), streamInputSynapse.getLastCol () );

// Configure memory input synapse
inputSynapse.setAdvancedColumnSelector ( "1-" + String.valueOf ( streamInputSynapse.getLastCol () - streamInputSynapse.getFirstCol () + 1 );

I use this often to speed up the processing.

Regards
MG
http://www.ferra4models.com

[ucicelos]

Hi MG,

Thanks for taking time to reply.

I am using one of the example and  it works when I initialize array in the following way

private double[][]  inputArray = new double[][] {
        {0.0, 0.0, 0.0},
        {0.0, 1.0, 1.0},
        {1.0, 0.0, 1.0},
        {1.0, 1.0, 0.0}
    };

but it gives me that error, when i use following code

private double[][]  inputArray=null;
public double createTrainValidate(double [][] inA) {
       inputArray = new double[inA.length][inA[0].length];
       inputArray=inA;

inA is the same double[][] array defined in some other class.

its just baffling me :(

[ucicelos]

Hi,

Don't worry....I think the array wasn't  getting initialized, Solved.

Thanks anyways :)

Ucicelos

[ferra4models]

> inputArray = new double[inA.length][inA[0].length];
> inputArray=inA;

These 2 lines look funny. First you initialise inputArray, then you assign it to something else? It seems that inA is the problem then? Maybe post more code to show inA's definition and the memory input synapse.

Regards
MG
http://www.ferra4models.com

[ferra4models]

OK, seems our posts crossed, so ignore my last one as well.....

Regards
MG
http://www.ferra4models.com