Displaying 20 results from an estimated 1000 matches similar to: "how to identify the outliers"
2003 Feb 04
1
test for two samples
Hi R-users,
My question is more methodological one, rather than technical.
I have to samples representing residuals based on two measurements
techniques (resid1,resid2; n=69). I need to compare two samples, to
reject one technique (the worse one), and to keep the one which gave
lower residuals (better one). What to look for? What should I analyse?
Means, variance, std. deviations?
Based on
2002 Aug 30
2
postscript() problem
Hi R-users,
I am using "postscript("xx.eps", horizontal=FALSE, onefile=FALSE,
height=6, width=10, pointsize=10)" and "barplot(xx.dat)" in R to produce
EPS graphics for LATeX document. When checking the graphics with "gv" I
see that it was not produced with full details. The main graphic is
there, but axes labels and titles are missing. While checking the
2002 Nov 07
4
negative and positive values in diff. colors
Hi R-users,
I have a set of elevation residuals as geodata points. I would like to
display them in the following way:
-negative values using pch=20 (filled circle)
-positive values using pch=1 (empty circle)
while using the cex.max=5, cex.min=0.1 for points() to represent the
residuals value. Basically I would like to distinguish neagtive and
positive values at my map. How to do this.
Thanks
2003 Sep 23
3
number of distinct values in a dataframe
Hi R-users,
How can I found the number of a distinct values in a data frame
(occurrence of distinct values)? The dataframe consists of several
thousands integer numbers.
Thanks,
Rado
--
Radoslav Bonk M.S.
Dept. of Physical Geography and Geoecology
Faculty of Sciences, Comenius University
Mlynska Dolina 842 15, Bratislava, SLOVAKIA
tel: +421 905 968 127 e-mail: rbonk at host.sk
2002 Jul 08
2
matrix: rows to columns conversion
Hi,
I'm new to "R". I have a matrix of 6x12. I need to produce matrix of
12x6, such that rows in new matrix are columns from original matrix, and
columns in a new matrix are rows from the original one. I was playing
with rbind(), and cbind() with no success.
Regards,
-Rado
--
Radoslav Bonk M.S.
Dept. of Physical Geography and Geoecology
Faculty of Natural Sciences, Comenius
2003 Sep 04
2
documents for writing functions
Hi,
Does anybody know suitable documents (manuals) on writing user functions
(covering loops, conditions ...) in R? Other than the usually available
manuals.
Thanks,
Rado
--
Radoslav Bonk M.S.
Dept. of Physical Geography and Geoecology
Faculty of Sciences, Comenius University
Mlynska Dolina 842 15, Bratislava, SLOVAKIA
tel: +421 905 968 127 e-mail: rbonk at host.sk
2003 Feb 20
3
outliers/interval data extraction
Dear R-users,
I have two outliers related questions.
I.
I have a vector consisting of 69 values.
mean = 0.00086
SD = 0.02152
The shape of EDA graphics (boxplots, density plots) is heavily distorted
due to outliers. How to define the interval for outliers exception? Is
<2SD - mean + 2SD> interval a correct approach?
Or should I define 95% (or 99%) limit of agreement for data interval,
2004 Jul 14
3
ROracle - fetch gives empty dataframe
Dear R-users,
I was able to make ROracle package to connect to the DB (Oracle91,
64bit, on Solaris). But after executing siple SQL query, "fetch"
commaned gives me an empty dataframe.
### RORACLE INSTALATION PROCEDURE ###
R CMD INSTALL --configure-args='--enable-extralibs' --enable-oracle32=no
~/tmp/ROracle_0.5-5.tar.gz #since we have 64bit Oracle9i instalation
PROBLEM:
2004 Jul 05
1
R and databases (Oracle)
Dear R users,
I'm working on implementation of hydrometeorological DB in Oracle9i and
would like to use R, as a plotting engine for graphs and maps and also
to perform some non trivial statistics on DB data using R. Thus any
links with examples or efforts on:
- general DB and R cooperation
- Oracle91 and R cooperation
- Oracle PL/SQL and R
are welcomed.
Thanks in advance,
Rado
--
2004 Jul 12
1
ROracle package error
Dear R-users,
In order to use ROracle (v. 0.5-5) package I compiled R-1.9.1 on Linux
(2.4.20-28.9smp) and installed it. I need to use Oracle9i on Solaris.
When executing "library(ROracle)" I got the following error message:
> library(ROracle)
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library
2006 May 18
2
matrix transformation into 3 columns II.
Dear R-users
Sorry for posting the previous message too soon before I have finished it.
I have matrix (mprecip) with headers:
> dim(mprecip)
[1] 6268 170
> mprecip
date GilzeRijen Eindhoven Volkel ZuidLimburg Arcen Ubachsberg
1 01/01/1978 NA 0.0 NA 0.1 NA NA
2 01/02/1978 NA 0.0 NA 0.0 NA NA
3
2004 Mar 22
4
R commands formating for LaTeX
Dear R users,
I have to include typical UNIX formated R commands and outputs into the
article using LaTeX.
What is the easiest way to include R prompt commands and text outputs
(including messages) into LaTeX documents? Is there any template or library?
So far I'm trying to produce R commands in LaTeX using LaTeX general
format options.
Thanks,
Rado
2004 Jul 05
4
extract columns from a dataframe
Dear R users,
I'm coming back to R after while. I have a data frame with 200 columns,
each column has a name. How to extract all columns to a new dataset, but
the specified (by names) ones?
I was playing with that for a little bit using the vector syntax but got
several syntax errors.
Thanks,
Rado
2004 Jul 14
0
ROracle - fetch gives...(corrected SQL code)
Sorry for posting the second time, I corrected the SQL code:
PROBLEM: after executing simple statement, from within R, "fetch"
function gives me the empty dataframe:
### CONNECTION, and SQL QUERY EXECUTION
> ora <- dbDriver("Oracle")
> con <- dbConnect(ora, "rado/only2admin"
> dbListTables(con)
character(0)
> rs <- dbSendQuery(con,
2004 Sep 10
3
Improving on Rice coding
Hello,
I am the author of the Bonk audio compression program... i've just been
looking at your comparrison table, and i noticed bonk gets marginally
better compression than Flac on some files (actually i was
rather surprised to see bonk on the list at all, it's not exactly high
profile :-) ).
Bonk in lossless mode is a pretty naive implementation of a predictive
coder, so the main
2004 Apr 21
2
Guaranteed bandwidth per connection
Dear all,
I''ve got a working HTB configuration with iptables, fwmark, SFQ etc.
At the moment, I can mark traffic and give it a maximum bandwidth and a minimum guaranteed bandwidth, so far so good.
What I would like to do is the following:
In stead of defining a min/max for a certain type of traffic (e.g. http, ftp whatever), I would like to define a "minimum guaranteed bandwidth
2005 Jan 18
0
standardised residuals using standard deviation
Dear R-users,
I need to standardize residuals using standard deviation. Is the
'stdres' the proper function? Beside other methods (for standardization
and normalization), are there some approaches how to standardize using
standard deviation?
Here is the sample of my residuals:
Zres040 Zres0820 Sres040 Sres0820 PCres040
-2.101740 -2.0682900 1.6328500 0.5046730
2006 Apr 11
2
my email address???
oh boy, looks like I screwed things up some trying to add hosting for
another domain besides my own
I thought I went by the book here but something sure ain't right.
my real email address is rado at rivers-bend.com
then a few days ago, I tweaked sendmail.mc I think it was to masquerade
ideallightinginc.com (the other domain) now I just noticed I am showing
as rado at ideallighting.com
2005 May 07
3
passwordless ssh
Hi,
I am just migrating to Centos from fedora core 3.
I have 3 boxes involved here:
Box A --Fedora 3 (doing the dns, http, sendmail serving duties)
Box B --CentOS
Box C --CentOS
I used to run root passwordless ssh both ways from boxes A and B mainly
set up to keep the 2 boxes in sync w/rsync ... these 2 boxes normally
ran one being the slave and the other being the master...the master did
all
2003 Aug 15
1
Encoder for Pocket PCs
Hi developers!
I would like to know if it is possible to use Vorbis encoder as a real-time encoder for Pocket PCs, because they don't have floating point based unit. If not, do you plan to make a fixed-point based encoder? I'm very interested in this issue so if I could help, I will. I'm working on fixed-point MP3 encoder for XScale devices in cooperation with Intel. It seems that