Displaying 6 results from an estimated 6 matches for "obsev".
Did you mean:
obdev
2005 Apr 06
5
bootstrap vs. resampleing
...can be used to estimate 95%
confidence interval for some statistics, e.g.
variance, median, etc. I have someone suggesting that
by resampling certain proportion of the total samples
(e.g. 80%) without replacement, we can also get the
estimate of confidence intervals. Here we have an
example of 1000 obsevations, we would like to estimate
95% confidence intervals for odds ratio for a
diagnostic test, can I use resampling 80% of the
observations without replacement, instead of
bootstrap, to do this? If not, why is it wrong to do
it this way?
Thanks
2012 May 29
2
Converting to XTS loses data.frame structure
...bles:
However, converting to an XTS seems to break that.
Example:
=============================================
d <- (read.csv(file.path(dataDir,thisFile), as.is=T))
myXTS <- as.xts( d, order.by=as.POSIXct(strptime(paste(d$Date, d$Time), '%m/%d/%y %H:%M')))
head(d)
Date Obsever Val.1 Time
1 10/12/09 PL 15 12:44
2 10/12/09 PL 15 12:44
head(myXTS)
Date Obsever Val.1 Time
2009-10-12 12:44:00 "10/12/09" "PL" "15" "12:44"
2009-10-12 12...
2005 Jul 13
3
plot the number of replicates at the same point
Dear R-helper,
I want to plot the following-like data:
x y
1 1
1 1
1 2
1 3
1 3
1 4
......
In the plot that produced, I don't want to show the
usual circles or points. Instead, I want to show the
number of replicates at that point. e.g. at the
position of (1,1), there are 2 obsevations, so a
number '2' will be displayed in the plot.
Is my narrative clear? Is there a way to make the plot
in R?
2002 Sep 09
1
Re: Biplot function of PCA
...vations are represented by their numbers (the line of the data
matrix), but I would need to change it.
I would like to have the possibility, to represent on a biplot, the
observations, by their name, or , by the group or the cluster they
belong.
For instance:
tab is a data.frame (4 variables x 52 obsevations)
pc.tab_princomp(tab,cor=TRUE)
biplot.princomp(pc.tab)
km_kmeans(tab,3,100)
cl_cutree(hclust(dist(tab)),k=3)
# I would like to obtain:
biplot.princomp(pc.tab, nomi=cl)
#or
biplot.princomp(pc.tab,nomi=km$cluster)
Like that I could see how the clusters are spread on the PCA.
So, my qu...
2011 Jun 30
0
help with interpreting what nnet() output gives:
...the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
------------------------------
Message: 57
Date: Wed, 29 Jun 2011 13:29:06 -0700 (PDT)
To: r-help at r-project.org
Subject: Re: [R] DROP OBSEVATION IN A GROUP
Message-ID:
<1309379346.85905.YahooMailRC at web121706.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
People with more experience in R I need help on this.
I would like to drop observation if they meet certain condition. In this example
I would like to dr...
2003 Nov 20
0
samba 3.0.0 Authentication with NTsp4
...n2K.
Server setting is for plaintext (un-encryted passwords).
On upgrading the Samba server to 3.0.0, (smb.conf file unchanged):
All WinNt clients fail to authenticare.
Win2k clients authenticate correctly.
On reverting back to Samba 2.2.x, all cleints authenticate correctly.
The same symptoms are obseved, independent of wheter the underlying OS is
Solaris 2.7 or Linux.
Below is level 10 traces of
1. WinNT system [bilbo] failing to connect to server [yoda]
and for comparison
2. Win2k system [yap] successfully connecting to server [yoda]
Joe Miles
--------------------------------------------...