Hello,
Sorry for the mess, the logical operation should also be changed to
conjunction:
no <- x[i, 1] <= a1 & x[i, 2] <= a2 & x[i, 3] >= a3 & x[i, 4] <= a4
Rui Barradas
Em 24-07-2012 13:09, Rui Barradas escreveu:
Hello,
Are you sure? With a matirx composed of those two rows only I had a
problem, the function to.keep() returned NULL. See the changes made to
avoid it.
# beginning of loop
for(i in seq_len(nrow(x))){
#yes <- x[i, 1] > a1 | x[i, 2] > a2 | x[i, 3] < a3 | x[i, 4] > a4
#if(all(yes)) keep(i, e)
# Original post, do NOT remove if equal
#no <- x[i, 1] < a1 | x[i, 2] < a2 | x[i, 3] > a3 | x[i, 4] < a4
# Changed to remove if equal
no <- x[i, 1] <= a1 | x[i, 2] <= a2 | x[i, 3] >= a3 | x[i, 4]
<= a4
if(all(!no)) keep(i, e)
}
if(e$ires == 0 && nrow(x) > 0)
x[1, ]
else
e$result[seq_len(e$ires), 1:nc]
# end of function
Em 23-07-2012 18:18, Reith, William [USA] escreveu:
It looks like both ways produce the same result.
-----Original Message-----
From: Rui Barradas [mailto:ruipbarra...@sapo.pt]
Sent: Monday, July 23, 2012 1:05 PM
To: Reith, William [USA]
Subject: Re: [External] Re: [R] Speeding up a loop
Hello,
But that's the negation of '<', so try to negate '<=', meaning,
remove the equal signs. Sorry if I wasn't very clear.
Rui Barradas
Em 23-07-2012 17:44, Reith, William [USA] escreveu:
This is what I have for the yes for loop
for(i in seq_len(nrow(x))){
yes <- x[i, 1] >= a1 | x[i, 2] >= a2 | x[i, 3] <= a3 | x[i,
4]>= a4
if(all(yes)) keep(i, e)
}
-----Original Message-----
From: Rui Barradas [mailto:ruipbarra...@sapo.pt]
Sent: Monday, July 23, 2012 12:14 PM
To: Reith, William [USA]
Cc: r-help
Subject: [External] Re: [R] Speeding up a loop
Hello,
I think this is a boundary issue. In your op you've said "less" not
"less than or equal to".
Try using "<=" and ">=" to see what happens, I bet it solves it.
Rui Barradas
Em 23-07-2012 14:43, wwreith escreveu:
1.15 60 0.553555415 0.574892872
1.15 60 0.563183983 0.564029359
Shouldn't the function row out the second one, since it it higher in
position 3 and lower in position 4 i.e. it should not all be yes?
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