Selecting items in a vector

From	"WJ" <w_a_x_man@yahoo.com>
Newsgroups	comp.lang.forth
Subject	Selecting items in a vector
Date	2016-07-21 18:05 +0000
Organization	A noiseless patient Spider
Message-ID	<nmr2t3$5s2$1@dont-email.me> (permalink)

Show all headers | View raw

R:

  Create a vector of random integers:

  > sample(-3:5, 22, rep=TRUE) -> v
  > v
   [1]  5  2 -3  2  4 -1 -2 -3 -3 -1  4  4 -1  0  0 -2 -2  1  2  0  0  3

  Find the indices at which v < 0:

  > which(v < 0)
  [1]  3  6  7  8  9 10 13 16 17

  Extract the negative numbers:

  > v[which(v < 0)]
  [1] -3 -1 -2 -3 -3 -1 -1 -2 -2

How much easier is it in ANS Forth?

-- 
After being told there was no money, the attackers tore off the woman's clothes
and raped her until five others arrived, according to the documents.  The new
arrivals took turns having sex with her and then sodomized her....  At gunpoint,
the assailants forced the mother and son to have sex.
www.sun-sentinel.com/local/palm-beach/sfl-flpdunbar0822nbaug22-story.html

Back to comp.lang.forth | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Selecting items in a vector "WJ" <w_a_x_man@yahoo.com> - 2016-07-21 18:05 +0000
  Re: Selecting items in a vector "WJ" <w_a_x_man@yahoo.com> - 2016-07-21 18:11 +0000
    Re: Selecting items in a vector "WJ" <w_a_x_man@yahoo.com> - 2016-07-21 20:44 +0000

csiph-web