here is a typical way to get the bin count
(~. ,: #/.~) 5 10 20 # 100 200 300
100 200 300
5 10 20
you can obtain a "stretch factor" with e.
5 10 20 e.~ 5 * i.5
0 1 1 0 1
then apply the stretch factor with # inv
100 200 300 # inv~ 5 10 20 e.~ 5 * i.5
0 100 200 0 300
all together:
(5 * i.5) ({.@:] #inv~ [ e. {:@:]) (~. ,: #/.~) 5 10 20 # 100 200 300
0 100 200 0 300
----- Original Message -----
From: Joe Bogner <[email protected]>
To: [email protected]
Cc:
Sent: Friday, November 14, 2014 6:04 AM
Subject: Re: [Jprogramming] projecting onto a fixed grid
I would probably do this:
(ys,0) {~ xs i. xGrid
0 100 200 0 300
On Thu, Nov 13, 2014 at 11:08 AM, Johann Hibschman <[email protected]>
wrote:
> 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
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
