Aaryan YVS

I see you have changed the code to accept the sampling value and assign it to self.sparsity [here](https://github.com/yilundu/gem/blob/e2f7496334152037c8fbce161b77dcb0a9db3d6c/dataio.py#L1307). But, in lines like [this](https://github.com/yilundu/gem/blob/e2f7496334152037c8fbce161b77dcb0a9db3d6c/dataio.py#L1351) where we are calling the sparsity function...