I have data that comes in the form of a vector. Each vector is sparse. Is there a commonly used distribution that will generate sparse vectors? I am working on a project where I am passing a bunch of dog images through a convolutional neural network(CNN) and trying to model a joint distribution of the activations at a specific layer. The activations are turning out to be sparse because the CNN is using RELU activation functions. As a result the the vector is sparse(has lots of zeros) and the nonzeros values can take on any value above zero.
Known distributions that generate sparse vectors?
machine learning;statistics