Converts the UK-DALE dataset to NILMTK HDF5 format.
For more information about the UK-DALE dataset, and to download it, please see http://www.doc.ic.ac.uk/~dk3810/data/
ukdale_path : str
The root path of the UK-DALE dataset. It is assumed that the YAML metadata is in ‘ukdale_path/metadata’.
output_filename : str
The destination filename (including path and suffix).
format : str
format of output. Either ‘HDF’ or ‘CSV’. Defaults to ‘HDF’