[Jprogramming] projecting onto a fixed grid

[Johann Hibschman]

I'm trying to figure out how best to project some values (think counts
for particular bins) onto a fixed grid of bins (think each bin in
order).

For example, this does what I want:

   xGrid=: 0 5 10 15 20
   xs=: 5 10 20
   ys=: 100 200 300
   ys (xGrid i. xs)}0*xGrid
0 100 200 0 300

It seems a little cumbersome, though, so I was wondering if there's a
better way.

Thanks,
Johann