Displaying 20 results from an estimated 500 matches similar to: "question about date's"
2005 Oct 20
5
search a value in variables dataset
Dear R-list,
I have a dataset, say (the real dataset is 20 columns,110200 rows).
> my.reducedID
V1 V2 V3 V4 V5 V6 V7 V8 V9
[1,] 1 0 0 1 14 3 1 0 2
[2,] 2 0 0 1 14 3 1 0 2
[3,] 0 1 0 1 14 2 1 0 2
[4,] 0 0 1 1 14 3 1 0 2
[5,] 0 1 1 0 14 2 1 0 2
[6,] 0 0 0 1 14 3 1 0 2
[7,] 0 0 0 1 0 3 1 0 2
[8,] 0
2005 Oct 12
1
arima with R
Hi,
I'm using R for some arima models. In the past I used for arima models Rats and Tsp. Using the R arima function, I get only the statistics sigma^2 and log likelihood; with Rats and Tsp it is possible to obtain more statistics, such as R, R square, Durbin Watson, standard error, etc.
Is it possible using R to have the statistics mentioned?
My best regards,
2005 Oct 23
1
factorizing many columns of a dataframe
Hi guys,
I have a large number of columns of a dataframe that I want to apply a common factorization to; the columns are all numeric and the factorization collapses some of these values into common groups (labels). How can I do this systematically?
Is there an analog to sapply that can pass columns as vectors to FUN?
Thanks in advance,
Gregory Gentlemen
---------------------------------
2005 Oct 20
2
information about Loess
Hello,
I'm currently using a tool that provides a Loess fitting, but I obtained results that are slightly different from those provided by R implementation of the Loess. That's why I would like to know if you could give me a source (bibliography or web) that explains in a clear way each step of the algorithm, with the possible options to choose, etc.. in order for me to understand those
2005 Jul 27
2
logistic regression: categorical value, and multinomial
I have two questions:
1. If I want to do a binomial logit, how to handle the
categorical response variable? Data for the response
variables are not numerical, but text.
2. What if I want to do a multinomial logit, still
with categorical response variable? The variable has 5
non-numerical response levels, I have to do it with a
multinomial logit.
Any input is highly appreciated! Thanks!
Ed
2005 Dec 06
7
R is GNU S, not C.... [was "how to get or store ....."]
======= 2005-12-06 22:16:17 伳侜佋佢伬伌佇伵佒佇佇伌伒伬仯伜=======
>Martin Maechler a 侀crit :
>
>> please, please, these trailing ";" are *so* ugly.
>> This is GNU S, not C (or matlab) !
>>
>> but I'll be happy already if you could
>> drop these ugly empty statements at the end of your lines...
>
>May I disagree ?
>I find missing ";" at
2005 Jul 26
3
text on some lines
Hi,
I would like to write text on 2 lines for example.
For example, if you have a long sentence and you want to cut it at the 45 caracter and put the continuation underneath!
Is it possible?
Thanks
Sabine
---------------------------------
[[alternative HTML version deleted]]
2005 Oct 07
3
index question
All,
I'm having a problem selecting directly from a vector. I've written ways to do this
indirectly, but I'd rather do it directly and didn't see this in the manual.
Essentially, I have:
> group.label.new
[1] 7 9 6 1 10 4 8 3 2 5
> junk
[1] 1 2
> group.label.new[junk && 8:10]
[1] 7 9 6 1 10 4 8 3 2 5
I'd like to select the elements
2005 Oct 16
3
Sorting a data frame by one of the variables
Dear all,
I have a date frame like this:
X Y Z
22 24 4.3
2.3 3.4 5.3
.....
....
57.2 23.4 34
What my purpose is: to sort the data frame by either X, Y or Z.
sample output is (sorted by X) :
X Y Z
2.3 3.4 5.3
.....
......
22 24 4.3
...
57.2 23.4 34
I have no idea how to use sort, order or rank functions. Please help me out.
Thanks!
Leaf
2005 Aug 03
1
abline and linearity over groups
Dear R users, please can you help me understand the behaviour of abline using function lm.
I'm trying to learn linearity over groups. So I make three groups with 10 values each:
test=data.frame(cbind(
l=c(rnorm(10,0,30),rnorm(10,100,30),rnorm(10,200,30)),
t = c(rep(0,10), rep(1,10), rep(2,10))
))
when I do:
plot(test$l~test$t)
abline(lm(test$l~test$t))
the abline is a straight line
2005 Jul 28
4
Running Internet Explorer from Withing R
Good morning,
Is it possible to open an html file using IE but from within R? I wrote a small function to generate tables in html but I'd like to write another function to call IE and open the html file.
Thanks,
Walt Paczkowski
________________________
Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
(V) 609-936-8999
(F) 609-936-3733
2005 Oct 15
2
batch file execution
I am new to R and really like to get a handle of basics in short period of
time. What I am trying to do is get myself a list of must-do's (read in
data, batch execution, delimiters, basic modeling commands) in R as in Stata
or SAS. I am just wondering how to execute a R batch file in RGui. Suppose I
have a script file (like do file in stata, or sas file in SAS) under
c:\whatever.R, how can I
2005 Aug 03
3
prcomp eigenvalues
Hello,
Can you get eigenvalues in addition to eigevectors using prcomp? If so how?
I am unable to use princomp due to small sample sizes.
Thank you in advance for your help!
Rebecca Young
--
Rebecca Young
Graduate Student
Ecology & Evolutionary Biology, Badyaev Lab
University of Arizona
1041 E Lowell
Tucson, AZ 85721-0088
Office: 425BSW
rlyoung at email.arizona.edu
(520) 621-4005
2005 Oct 24
2
GAM and AIC: How can I do??? please
Hello, I'm a Korean researcher who have been started to learn the "R"
package.
I want to make gam model and AIC value of the model to compare several
models.
I did the GAM model, but there were error for AIC.
SO, how can I do? pleas help me!!!
I did like below;
> a.fit <- gam(pi~ s(t1r), family = gaussian(link="log"))
>
2005 Nov 21
5
SPSS and R do they like each other?
Hi,
I wonder how well SPSS and R communicate, because I
need SPSS but would like to do some data manipulations
in R. However I am very afraid of never ending
import-export-complications ? especially with all
those labels and extra information my SPSS files
contain. My data come from SPSS and have to be
exported to SPSS again (because I need to produce
special output tables, which would be hard to
2005 Oct 18
6
p-value calculation
hello everybody
i'm very new at using R so probably this is a very stupid question.
I have a problem calculating a p-value. When i do this with excel i
can use the method CHIDIST for 1.2654 with 1 freedom degree i get the
answer 0.261
i just want to do the same thing in R but i can't find a method.
can somebody help me
friendly regards
richard
2005 Nov 27
4
Counting the occurence of each unique "charecter string"
LS,
I would really like to know how to count the frequency/occurrence of chachters inside a dataset. I am working with extreemly large datasets of forest inventory data with a large variety of different species inside it.
Each row inside the dataframe represents one individual tree and the simplified dataframe looks something like this:
num species dbh
1 sp1
2005 Nov 27
4
Counting the occurence of each unique "charecter string"
LS,
I would really like to know how to count the frequency/occurrence of chachters inside a dataset. I am working with extreemly large datasets of forest inventory data with a large variety of different species inside it.
Each row inside the dataframe represents one individual tree and the simplified dataframe looks something like this:
num species dbh
1 sp1
2005 Oct 20
4
creating a derived variable in a data frame
Hello,
I have read through the manuals and can't seem to find an answer.
I have a categorical, character variable that has hundreds of values. I want to group the existing values of this variable into a new, derived (categorical) variable by applying conditions to the values in the data.
For example, suppose I have a data frame with variables: date, country, x, y, and z.
x,y,z are
2005 Jun 13
5
slow loading with lme4
it takes a long time to load the lme4 package.anyone else encounter this problem?
> system.time(library(lme4))
佋佖伻侂佇佽佉仾伒伳伋佁伡伃伆侟仯伜Matrix
佋佖伻侂佇佽佉仾伒伳伋佁伡伃伆侟仯伜lattice
[1] 19.90 0.30 25.56 NA NA
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status Patched
major 2
minor