Re: Count pattern
- To: mathgroup at smc.vnet.net
- Subject: [mg41322] Re: [mg41289] Count pattern
- From: Bobby Treat <drmajorbob at mailblocks.com>
- Date: Wed, 14 May 2003 08:18:16 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
t = {1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 17, 27, 28, 30, 36, 50};
s = {1, 1, 1, 2, 2, 3, 4, 5, 6, 7, 8, 8, 10, 12, 12, 14, 17, 20,
27, 27, 28, 30, 30, 36, 38, 40, 45, 50, 50, 50, 63, 132, 132};
<< Calculus`Integration`
Tr /@ Outer[Boole@GreaterEqual[#2, #1] &, t, s]
or
Tr /@ Outer[If[#2 ? #1, 1, 0] &, t, s]
If s and t could be HUGE, a different approach may be needed.
Bobby
-----Original Message-----
From: =?iso-8859-1?Q?S=F8ren_Merser?= <merser at image.dk>
To: mathgroup at smc.vnet.net
Subject: [mg41322] [mg41289] Count pattern
hi there
i need a litle help on a problem that has puzzeled me for some time
i want to count the number of elements in s with value greater or equal
to each element in t
t = {1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 17, 27, 28, 30, 36, 50}
s = {1, 1, 1, 2, 2, 3, 4, 5, 6, 7, 8, 8, 10, 12, 12, 14, 17, 20, 27,
27, 28, 30, 30, 36, 38, 40, 45, 50, 50, 50, 63, 132, 132}
the result should be: {33, 30, 28, 27, 26, 25, 24, 23, 21, 20, 18, 17,
15, 13, 12, 10, 6}
kind regards soren