Displaying 20 results from an estimated 1000 matches similar to: "Undefined columns selected"
2011 Jun 14
2
Off-topic: (Simple?) Random Sampling when n is a random variable
Hi everyone,
I'm involved in a discussion with a colleague. He suggested a sample
design for a finite-sized process that (to all intents and purposes)
involves tossing a coin and examining the unit if the coin shows
Heads.
I should emphasize that we're both approaching the problem from a
design-based sampling theory point of view. So I have no argument
about the appropriateness of the
2013 Feb 04
1
How to obtain the model/equation at each level automatically in a regression model with a few factors
I am wondering how to obtain the model/equation at each level automatically
in a regression model with a few factors
without looking at summary of the lm model. For example, consider
lm.factors <- lm(y ~ x1 + factor(x2)*factor(x3)+x4*factor(x5))
The coefficients of lm.factors in summary(lm.factors) might be complicated.
I would like to have the equation at each level from lm.factor.
Could you
2013 Jan 15
1
Random Forest Error for Factor to Character column
Hi,
Can someone please offer me some guidance?
I imported some data. One of the columns called "JOBTITLE" when imported was imported as a factor column with 416 levels.
I subset the data in such a way that only 4 levels have data in "JOBTITLE" and tried running randomForest but it complained about "JOBTITLE" having more than 32 categories. I know that is the limit
2011 May 02
1
Optimization - n dimension matrix
Dear all,
I am facing the following problem in optimization:
w = (d, o1, ..., op, m1, ..., mq) is a 1 + p + q vector
I want to determine:
w = argmin (a - d(w))' A (a - d(w))
where a is a 1xK marix, A is the covariance matrix of vector a, d(w) is a
1xK vector which parameters are functions of parameters d, o1 .. op, m1 ..
mq.
Is there some function to solve this problem easily? I know
2011 May 02
1
UNIX-like "cut" command in R
The R "cut" command is entirely different from the UNIX "cut" command.
The latter retains selected fields in a line of text. I can do that kind
of manipulation using sub() or gsub(), but it is tedious. I assume there
is an R function that will do this, but I don't know its name. Can you
tell me?
I'm also guessing that there is a web page somewhere that will tell
2011 May 04
1
problem with package "adapt" for R in Mac
Hi,
How i can install the package "adapt" in some version of R for mac?
i try in 2.13, 2.9,2.7 and other previous versions... and nothing happens.
and another question: There are some packages that do the same but that it
is implemented for mac? (calculate integrals in 2 or more dimmensions).
help me please, it's for an important work.
greetings.
--
Matías Hernán Ramírez
2011 May 05
1
functions pandit and treebase in the package apTreeshape
Hello.
I'm trying to use the functions pandit and treebase. They are in the package apTreeshape. Once I've loaded the package, R responses:
- no function pandit/treebase.
Somebody knows why or what is the reason?
Thanks,
Arnau.
------------------------------------------------------------
Arnau Mir Torres
Edifici A. Turmeda
Campus UIB
Ctra. Valldemossa, km. 7,5
07122 Palma de Mca.
2011 May 04
1
bivariate linear interpolation
Hi,
I have three matrices (X,Y,P) with the same dimension. The X,Y grid is
regular and I want to
perform linear interpolation to pick out certain points. In matlab
appropriate call is
something like
Pout=interp2(X,Y,P,Xout,Yout, method="linear")
where Xout and Yout are the locations where I want the Pout data
(typically a different grid).
(Scipy has this routine in
2013 Jan 17
2
Explore patterns with GAM
Dear all,
I new to r and I would like your help.
I want to explore the patterns (unimodal, monotonically increased/decreased)
of species richness~altitude using GAM in R. Although I run the gam function
in mgcv package I do not know how to manually define knots and degrees of
freedom.
Any help would be greatly appreciated.
Spyros
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2011 May 04
1
two-way group mean prediction in survreg with three factors
I'm fitting a regression model for censored data with three categorical
predictors, say A, B, C. My final model based on the survreg function is
Surv(..) ~ A*(B+C).
I know the three-way group mean estimates can be computed using the predict
function. But is there any way to obtain two-way group mean estimates, say
estimated group mean for (A1, B1)-group? The sample group means don't
2011 May 03
1
delete excel id automatically generated
Dear community,
I uploaded an excel with read.xls. My xls file actually have a column which
is an id, ("plot" is the id) :
plot height area
34 7.6 5.4
85 3.2 4.1
89 5.4 8.4
121 6.7 6.2
...
1325 2.1 1.5
However R uses another id, this way:
r id plot height area
1 34 7.6 5.4
2 85 3.2 4.1
3 89 5.4 8.4
4 121
2011 May 04
1
Uniform Gaussian Kernel
I have a vector with lots of different numbers. I need to make a graph
showing the Uniform Distribution of the figures. I have created a graph
showing all the different values, but now want individual Gaussian Kernel
round each point. This is what I have but each time it comes up with an
error as I have just based it on the Normal Distribution, but I'm not sure
what I need to change to make it
2013 Jan 17
1
plotting from dataframes
thanks to your guys help I am closer to solving my problem but I have some
small problem. So let's say I start with
>data
number day hour
1 17 10
2 17 11
3 17 6
4 18 4
5 18 10
6 19 8
7 19 8
I want to split to odd days, which I am able to do, I call this object
frames, which looks like:
> frames
$`1`
c1 day1 hour1
1 1 17 10
2 2 17 11
3 3 17 6
$`2`
c1 day1
2011 Apr 28
1
Variance
I'm trying to find the variance of various outputs in a matrix:
for(l in 2:vl){
for(o in 1:(l-1)){
# Make sure the inputs are for the matrix "m"
input3=rownames(v)[o]
input4=colnames(v)[l]
r=t[(t$Rec1==input3 & t$Rec2==input4),output]
if(length(r)==0){
r=t[(t$Rec1==input4 & t$Rec2==input3),output]
}
v[l,o]=var(q,na.rm=TRUE)
2011 May 17
3
gsub() issue...
Un texte encapsul? et encod? dans un jeu de caract?res inconnu a ?t? nettoy?...
Nom : non disponible
URL : <https://stat.ethz.ch/pipermail/r-help/attachments/20110517/1812d6c6/attachment.pl>
2011 May 04
1
fGarch
Hi,
I am attempting to fit a ARMA/GARCH regression model without success.
### ARIMA-GARCH model with regressor ###
### Time series data: A multivariate data set.
cov.ts.dq = cov.ts[1:4,"dq1"][!is.na(cov.ts[,"dq1"])]
cov.ts.day = ts.intersect(dq = diff(q.ts), day = lag(q.ts, -1))
### The following R scripts work:
(summary(no.day.fitr <- garchFit(dq ~ arma(0,3) +
2011 May 04
2
select value from a column depending on a value in another column
Hi everybody
I couldn't find the solution to what must be quite a simple problem. Maybe
you can help?
treatment session period stage wage_accepted market
1 1 1 1 1 25 public
2 1 1 1 1 19 privat
3 1 1 1 1 15 public
4 1
2013 Jan 17
2
create block diagonal with each rows
Dear R users,
I'd like to create a block diagonal matrix with each rows in a matrix.
Here is a simple example. (In fact, the matrix is big)
x <- matrix(1:20, 4,5)
> x
[,1] [,2] [,3] [,4] [,5]
[1,] 1 5 9 13 17
[2,] 2 6 10 14 18
[3,] 3 7 11 15 19
[4,] 4 8 12 16 20
With each rows in matrix x, I'd like to make the matrix below.
2011 May 02
3
subseting data
Hi,
Is it possible (i am sure it is) to subset data from a data.frame on the basis of SQL >LIKE< operator. I.e., i would like to subset a data where only values which contains a string >GP< would be used?
Example:
Gp<-subset(DF, DF$USCS like >GP<)
This like of course is not working,
Thanks, m
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2011 May 03
3
Watts Strogatz game
Hi,
I have a erdos-renyi game with 6000 nodes and probability 0.003.
g1 = erdos.renyi.game(6000, 0.003)
How to create a Watts Strogatz game with the same probability.
g1 = watts.strogatz.game(1, 6000, ?, ?)
What should be the third and fourth parameter to this argument.
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