Thanks Martin, this is very helpful.
Barth
-Original Message-
From: Martin Morgan [mailto:mtmor...@fhcrc.org]
Sent: Thursday, April 14, 2011 11:04 AM
To: Barth B. Riley
Subject: Re: [R] for loop performance
On 04/14/2011 07:12 AM, Barth B. Riley wrote:
> Hi Martin
>
> Quest
On 04/13/2011 02:55 PM, Barth B. Riley wrote:
Dear list
I am running some simulations in R involving reading in several
hundred datasets, performing some statistics and outputting those
statistics to file. I have noticed that it seems that the time it
takes to process of a dataset (or, say, a se
On Thu, Apr 14, 2011 at 06:50:56AM -0500, Barth B. Riley wrote:
>
> Thank you Phillip for your post. I am reading in:
>
> 1. a 3 x 100 item parameter file (floating point and integer data)
> 2. a 100 x 1000 item response file (integer data)
> 3. a 6 x 1000 person parameter file (contains simulati
Thank you Phillip for your post. I am reading in:
1. a 3 x 100 item parameter file (floating point and integer data)
2. a 100 x 1000 item response file (integer data)
3. a 6 x 1000 person parameter file (contains simulation condition information,
person measures)
4. I am then computing several
> I am running some simulations in R involving reading in several
> hundred datasets, performing some statistics and outputting those
> statistics to file. I have noticed that it seems that the time it
> takes to process of a dataset (or, say, a set of 100 datasets) seems
> to take longer as the si
Dear list
I am running some simulations in R involving reading in several hundred
datasets, performing some statistics and outputting those statistics to file. I
have noticed that it seems that the time it takes to process of a dataset (or,
say, a set of 100 datasets) seems to take longer as th
Hi Uwe,
Thank you so much for your help. It works great with your
suggestion/help. WOW, what a difference!
--MyC
>
>
> [EMAIL PROTECTED] wrote:
>> WRT: Say length(V1) is n, do you want to compare
>>> v1[1] with v2[1] and v2[2] and v1[2] with v2[3] and v2[4]
>>> or
>>> v1[1] with v2[1] and v2[n
[EMAIL PROTECTED] wrote:
> WRT: Say length(V1) is n, do you want to compare
>> v1[1] with v2[1] and v2[2] and v1[2] with v2[3] and v2[4]
>> or
>> v1[1] with v2[1] and v2[n+1] and v1[2] with v2[2] and v2[n+2]
>
> v1[1] with (v2[1] and v2[2])
> v1[2] with (v2[3] and v2[4])
> v1[3] with (v2[5] and
WRT: Say length(V1) is n, do you want to compare
> v1[1] with v2[1] and v2[2] and v1[2] with v2[3] and v2[4]
> or
> v1[1] with v2[1] and v2[n+1] and v1[2] with v2[2] and v2[n+2]
v1[1] with (v2[1] and v2[2])
v1[2] with (v2[3] and v2[4])
v1[3] with (v2[5] and v2[6])
...
v1[n] with (v2[n+1] an
My Coyne wrote:
> Hello,
>
>
>
> Newbie question and hope you can help .
>
> I have two vector V1 and V2, where length(V2) = length of (V1) * 2;
> length(V1) ~ 16,000.
>
> For each member in V1, I need to compare 2 element of V2 for equality
If just the comparison is concerned, you can do
Hello,
Newbie question and hope you can help .
I have two vector V1 and V2, where length(V2) = length of (V1) * 2;
length(V1) ~ 16,000.
For each member in V1, I need to compare 2 element of V2 for equality
i.e.
for (I in 1:length (V1)) {
if ( v2[i] == v1[i] & v2[i+1]==v1[i] ){
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