Take these two verbs — please
The innards of verbs to produce simple graphs or barcharts are much the same. Variations arise in whether to produce a graph or barchart, the orientations of the figures, the direction of numbering the vertical axis, and suchlike. Rather than produce a large number of separate verbs, one for each of these numerous possibilities, a better solution is to produce a plotting conjunction P that takes two verbs u and v as arguments, and produces a verb that, applied to a list of nonnegative integers, yields the desired result. J provides facilities to make the job easier. Simply create a character string that gives the definition, using x for the left verb argument and y for the right verb argument, and apply the conjunction definition adverb 2 : . P=. 2 : 'x@(]y/>:@i.@(>./)){'' *''"_' u P v u@(] v/ >:@i.@(>./)) { ' *'"_ z=.2 9 7 4 ((]P>: ; ]P=) ,: (|:P>: ; |.@|:P=)) z ┌─────────┬─────────┐ │** │ * │ │*********│ *│ │******* │ * │ │**** │ * │ ├─────────┼─────────┤ │**** │ * │ │**** │ │ │ *** │ * │ │ *** │ │ │ ** │ │ │ ** │ * │ │ ** │ │ │ * │* │ │ * │ │ └─────────┴─────────┘ |