View Composition - AliciaSchep/vegalite GitHub Wiki

add_layer() function:

• Initializes new empty layer. Subsequent calls to "encode_" and "mark_" will apply to that layer.

• Could also potentially accept encoding and mark, so that it would initialize a new layer with encoding and mark.

vl_hconcat() and vl_vconcat():

• Take two+ vegalite objects and combine together, validating that data is same.