" <------------------------- sam121.txt ---------------------------->
)copy cap2/handbook/wksp/df diff dltmb erect H
m # 1 62 R 'vform    variable format by row of a matrix [ escape escapex ]'
m # m,[1]  'xvec     expand logical vector                                '
m # m,[1]  'xdiv     zero tolerant divison [ cdiv ]                       '
erect m
)off