ExpandDimensions

ExpandDimensions[full,partial]⟹out

expands dimensions of partial to match dimensions of full.

Details

Expands dimensions by padding right with last element of corresponding dimension of 'partial'.

Repeat a single element to fill the list:

Pad right with last element Y:

Does nothing because the dimensions already match:

Repeat a single element to match a more complicated pattern:

Pad right with last element: