Displaying 20 results from an estimated 400 matches similar to: "nnet question"
2007 Jan 25
1
rpart question
I make classification tree like this code
p.t2.90 <- rpart(y~aa_three+bas+bcu+aa_ss,
data=training,method="class",control=rpart.control(cp=0.0001))
Here I want to set weight for 4 predictors(aa_three,bas,bcu,aa_ss).
I know that there is a weight set-up in rpart.
Can this set-up satisfy my need?
If so, could someone give me an example?
Thanks,
Aimin Yan
2006 Dec 25
2
Problem to generate training data set and test data set
I have a full data set like this:
aa bas aas bms ams bcu acu omega y
1 ALA 0 127.71 0 69.99 0 -0.2498560 79.91470 outward
2 PRO 0 68.55 0 55.44 0 -0.0949008 76.60380 outward
3 ALA 0 52.72 0 47.82 0 -0.0396550 52.19970 outward
4 PHE 0 22.62 0 31.21 0 0.1270330 169.52500 inward
5 SER 0 71.32 0 52.84 0 -0.1312380 7.47528 outward
6
2006 Oct 24
2
for help
I have a question in R.
In directory H:/Delta_angle
I have 19 files like this:
ALA.delta
ASN.delta
ASP.delta
CYS.delta
GLN.delta
GLU.delta
HIS.delta
ILE.delta
LEU.delta
LYS.delta
MET.delta
PHE.delta
PRO.delta
SER.delta
THR.delta
TRP.delta
TYR.delta
VAL.delta
I want to read these files to 19 data sets in R.
All these data sets have "P","AA",index","delta"
2007 Jan 19
2
split data set
I have a data(ABC) like this:
x y
A 3 4
A 1 3
B 2 6
B 4 8
C 5 4
C 6 7
I want to split this data into
A:
x y
A 3 4
A 1 3
B
B 2 6
B 4 8
C
C 5 4
C 6 7
anyone knows how to do that?
thanks,
Aimin Yan
2006 Dec 13
2
install.packages
I try to type this in my R-winEdt.
but I got these. Do you know?
Aimin
>
install.packages('http://rh-mirror.linux.iastate.edu/CRAN/bin/windows/contrib/2.4/plotrix_2.1-6.zip')
Warning in download.packages(pkgs, destdir = tmpd, available = available, :
no package
'http://rh-mirror.linux.iastate.edu/CRAN/bin/windows/contrib/2.4/plotrix_2.1-6.zip'
at the
2006 Nov 23
2
Sweave question
I try Sweave
and get Sweave-test-1.tex
but hot to run LaTeX on 'Sweave-test-1.tex'?
I am using WinEdt.
thanks,
Aimin
> Sweave(testfile)
Writing to file Sweave-test-1.tex
Processing code chunks ...
1 : print term verbatim
2 : term hide
3 : echo print term verbatim
4 : term verbatim
5 : echo term verbatim
6 : echo term verbatim eps pdf
7 : echo term verbatim eps pdf
2006 Nov 23
2
random effect question and glm
consider p as random effect with 5 levels, what is difference between these
two models?
> p5.random.p <- lmer(Y
~p+(1|p),data=p5,family=binomial,control=list(usePQL=FALSE,msV=1))
> p5.random.p1 <- lmer(Y
~1+(1|p),data=p5,family=binomial,control=list(usePQL=FALSE,msV=1))
in addtion, I try these two models, it seems they are same.
what is the difference between these two model. Is
2006 Nov 20
4
for help about logistic regression model
I have a dataset like this:
p aa
index x y z sdx sdy sdz delta as
ms cur sc
1 821p MET 1 -5.09688 32.8830 -5.857620 1.478200 1.73998 0.825778
13.7883 126.91 92.37 -0.1320180 111.0990
2 821p THR 2 -4.07357 28.6881 -4.838430 0.597674 1.37860 1.165780
13.7207 64.09 50.72 -0.0977129 98.5319
3 821p GLU 3 -5.86733 30.4759
2004 Mar 02
4
how to delete a matrix column
Hello,
I am new to R, How to delete a matrix column.
Thanks,
2007 Mar 12
1
knncat question
I use knncat to make a predictive model
and get misclass rate
> knncat.m<-knncat(training.new,k=c(10,20),classcol=5)
> knncat.m
Training set misclass rate: 36.88%
then I try to calculate prediction accuracy by the following:
> pr.knncat.train <- predict
(knncat.m,training.new,training.new,train.classcol=5,newdata.classcol=5)
> tb.knncat.train <-table (pr.knncat.train,
2008 Feb 11
1
scatterplot in CAR
I am trying to use scatterplot function in CAR like the following:
scatterplot(X~Y)
I want to label X points and Y ponits using the different color.
Any idea for this?
Aimin
2004 Mar 19
2
(no subject)
How to use "contour" function?
I type "contour(th1,th2,SumofSquares,levels=c(seq(1000,4000,200)))"
But I didn't see contour in the plot, I guess it is because my data is so
big that contour is out of range.
Does anybody know how to fix this problem?
here th1 is a 1x101 array(158741.8-298529.6)
th2 is another 1X101 array(-0.0058352269-0.2093140935)
SumofSquares is a
2006 Nov 30
4
R_WinEdt question
if I want to put fig1plot to the left, figYPplot to the right
figYAaplot on the bottom.
How to modify the following cod to do these?
\begin{figure}[H]
\centering
\begin{minipage}[t]{0.5\textwidth}
\centering
<<label=fig1plot,fig=TRUE,echo=FALSE>>=
<<fig1plot>>
@
%\caption{Caption 1}
\end{minipage}
\begin{minipage}[t]{0.5\textwidth}
\centering
2006 Nov 28
3
Predicted values in lmer modeling
Dear All,
I am working with linear mixed-effects models using the lme4 package in
R. I created a model with the lmer function including some main effects,
a two-way interaction and a random effect. Now I am searching for a way
to save the predicted values for this model.
As far as I can see, there is no command in lme4 to save the predicted
values (like the predict(model) function in e.g.
2006 Nov 23
1
integrate R code to WinEdt file
I want to integrate R code to my WinEdt file.
Can someone tell me how to do this?
I copy R code to my WinEdt file, but it does't work.
Aimin Yan
2004 Mar 03
1
(no subject)
how to produce a Row Reduced Echelon Form for a matrix in R?
Aimin Yan
2006 Nov 26
1
plot p(Y=1) vs as
I am trying to fit a logistic regression model for this data set.
Firstly, I want to plot P(Y=1) vs As and P(Y=1) vs Aa.
Does any body know how to do these in R.
Thanks,
Aimin
> p5 <- read.csv("http://www.public.iastate.edu/~aiminy/data/p_5_2.csv")
> str(p5)
'data.frame': 1030 obs. of 6 variables:
$ P : Factor w/ 5 levels "821p","8ABP",..: 1
2006 Dec 08
1
question for if else
I have a data set like this
I want to assign "outward" to Y if sc <90 and assign "inward" to Y if sc>=90.
then cbind(p1982,Y) to get like these
p aa as ms cur sc Y
1 154l_aa ARG 152.04 108.83 -0.1020140 92.10410 inward
2 154l_aa THR 15.86 28.32 0.2563560 103.67100 inward
3 154l_aa ASP 65.13 59.16 0.0312137 7.27311 outward
4 154l_aa CYS 57.20 49.85
2007 Feb 02
1
CGIwithR
I try a example
http://omega.psi.iastate.edu/bootstrapFile.html
it doesn't give me output. I don't why.
For another example
http://omega.psi.iastate.edu/trivial.html
it seems works except it doesn't display figure.
Does anyone know how to figure it out?
Aimin
2007 Mar 07
1
how to avoid to overwrite object
Dear R list,
I have a question in R, it could be very simple, but I don't know how to do it?
for example:
I assign 6 to x in beginning of of my R script code
> x<-6
......
After many line code, I forget using x variable before, I use x
again, and do assignment like this
> x<-45
> x
[1] 45
then value 6 of previous x is replaced by 45.
I am wondering if there are some way R