NB: More recent documentation for Dyalog APL is available at https://docs.dyalog.com/20.0/.
The form R←X⍀Y implies expansion along the first axis whereas the form R←X\Y implies expansion along the last axis (columns). See Expand.
NB: More recent documentation for Dyalog APL is available at https://docs.dyalog.com/20.0/.
The form R←X⍀Y implies expansion along the first axis whereas the form R←X\Y implies expansion along the last axis (columns). See Expand.