Index out of range: 0 -> 89+0 to 0

[alysak6075]

Hi. First of all this is a great library that you have created.

I set up the Mnist test example and everything runs fine.

When I try to create my own with images as files and using the Mnist example as a staring point i try to convert the png file into a byte array and use the name of the file as a label but i get this as an error:

Exception in thread "main" java.lang.IllegalArgumentException: Index out of range: 0 -> 89+0 to 0
at com.github.neuralnetworks.util.Tensor.lambda$getIndex$14(Tensor.java:150)
at com.github.neuralnetworks.util.Tensor$$Lambda$25/1853205005.applyAsInt(Unknown Source)
at java.util.stream.IntPipeline$3$1.accept(Unknown Source)
at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Unknown Source)
at java.util.Spliterator$OfInt.forEachRemaining(Unknown Source)
at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at java.util.stream.IntPipeline.reduce(Unknown Source)
at java.util.stream.IntPipeline.sum(Unknown Source)
at com.github.neuralnetworks.util.Tensor.getIndex(Tensor.java:154)
at com.github.neuralnetworks.util.Tensor.set(Tensor.java:93)
at com.github.neuralnetworks.util.Matrix.set(Matrix.java:102)
at main.LetterTargetMultiNeuronOutputConverter.convert(LetterTargetMultiNeuronOutputConverter.java:23)
at main.LetterInputProvider.getNextUnmodifiedInput(LetterInputProvider.java:122)
at com.github.neuralnetworks.training.TrainingInputProviderImpl.getNextInput(TrainingInputProviderImpl.java:19)
at com.github.neuralnetworks.training.OneStepTrainer.train(OneStepTrainer.java:42)
at main.my_test1.my_cnn(my_test1.java:51)
at main.my_test1.main(my_test1.java:27)

can you please explain why this would happen. Im new to NN and am not sure how to use the Mnist example to make it work with png files instead of the Mnist IDX files.