dataset for machine learning example in WarpX / ImpactX

<p>This contains data for a machine learning workflow using codes from the BLAST suite supported at Lawrence Berkeley National Laboratory. &nbsp;There are 2 directories:&nbsp;</p> <p>lab_particle_diags: contains particle diagnostics in openPMD format for use in training neural networks<br>models: parameters of pre-trained neural networks for use in inference</p>