[R] strings as factors
Hi,
To be able to match cases with a benchmark I need to have a data.frame with
a character id variable. however, I am surprised why this seems to be so
hard. In fact I was unable to succeed. Here is what I tried:
test1 -expand.grid(ID = 1:2, sex = c(male,female))
is(test1[,2])
[1] factor oldClass
test2 -expand.grid(ID = 1:2, sex = c('male','female'))
is(test2[,2])
[1] factor oldClass
test3 -expand.grid(ID = 1:2, sex = I(c(male,female)))
is(test3[,2])
[1] factor oldClass
test4 -expand.grid(ID = 1:2, sex = I(c('male','female')))
is(test4[,2])
[1] factor oldClass
options(stringsAsFactors = FALSE)
options(stringsAsFactors)
$stringsAsFactors
[1] FALSE
test5 -expand.grid(ID = 1:2, sex = I(c('male','female')))
is(test5[,2])
[1] factor oldClass
is there anyway I can get sex to be a character?
Arnab
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Re: [R] RSQLite +textConnection()
Hi Seth,
Thank you for taking the trouble to look. I have created some code that
simulates the problem. SOme additional observations are:
a) After giving the error Error in textConnection(readLines(f, n = 2)) :
all connections are in use I cannot ask for sessionInfo(). I get the error
message
sessionInfo()
Error in gzfile(file, rb) : all connections are in use
So I am presenting the sessionInfo() output after reading in the first 124
files.
sessionInfo()
R version 2.4.0 (2006-10-03)
i686-pc-linux-gnu
locale:
LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=en_US.UTF-8;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C
attached base packages:
[1] methods stats graphics grDevices utils datasets
[7] base
other attached packages:
RSQLite DBI
0.4-1 0.1-10
Next, below is the code that I used to generate this. Its not too big so i
just pasted it into the email. it creates 130 files first and then tries to
read them in and save them in alexander.db, it then performs a query and
then closes.
Hopefully, this will be helpful in tracking down the source of the problem.
thank you,
Alex.
# R Script
test.dir - /home/alex/test
setwd(test.dir)
N - 130
dat -data.frame(ID = 1:N, Marks = runif(N)*100, Class = sample(c(I,
II,III,IV),size = N, replace = TRUE) )
for (i in 1:N){
write.csv(dat[i,], paste(test-, i,.csv, sep = ), row.names =
FALSE)
}
# getting the filenames
filename - list.files()
library(RSQLite)
driver-dbDriver(SQLite)
connect-dbConnect(driver, dbname = alexander.db)
lapply(filename[1:124], FUN = function(x){
cat(paste(doing,x, \n))
testID - as.data.frame((scan(file = x, what = list(ID = 1, Marks =
35.0861437153071, Class = II), skip = 1, sep = ,)))
dbWriteTable(connect, grades, testID, row.names = FALSE, append =
TRUE, eol = \r\n )
})
# LIST ALL TABLES IN THE DATABASE
dbListTables(connect)
# QUERY DATA AGAINST TBL_ratings IN THE DATABASE
query01-dbSendQuery(connect, statement = select * from tbl_ratings);
# FETCH 10 RECORDS OF DATA INTO A DATA FRAME
(data01-fetch(query01, n = 10));
# CLOSE THE CONNECTION
sqliteCloseConnection(connect);
From: Seth Falcon [EMAIL PROTECTED]
To: Alexander Nervedi [EMAIL PROTECTED]
CC: [EMAIL PROTECTED], r-help@stat.math.ethz.ch
Subject: Re: [R] RSQLite +textConnection()
Date: Mon, 27 Nov 2006 21:50:23 -0800
Alexander Nervedi [EMAIL PROTECTED] writes:
They are uptodate. When I run it on windows the i can load upto 200
files, while on Linux it stops after loading 125.
Could you provide as much of a reproducible example as possible (along
with sessionInfo())? I will try and have a look.
+ seth
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[R] comma delimiter comma in text
Hi I have data like 1, A, 24, The Red House 2, A, 25, King's Home, by the Sea ... I'd like to read this in as three variables. I first tried temp -read.csv(addresses, sep = , ) it worked but line 2 was broken after King's Home, and by the Sea as placed in another line. and so i eneded up with more number of rows than in the data. when i tried temp -read.csv(addresses, sep = , , flush = TRUE) i got things right number of rows, but column 3 was truncated till the 3rd comma. Is there a way i can specify to R that King's Home, by the Sea is one word? u r pal, al _ All-in-one security and maintenance for your PC. Get a free 90-day trial! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] RSQLite basic
Hi. I am still trying to figure out how connection and RSQLIte function. When i run the following commands library(RSQLite) m - dbDriver(SQLite, max.con = 25) con - dbConnect(m, dbname=sqlite.db) on my windows laptop everthing works fine. For example: m - dbDriver(SQLite, max.con = 25) con - dbConnect(m, dbname=sqlite.db) version _ platform i386-pc-mingw32 arch i386 os mingw32 system i386, mingw32 status major 2 minor 4.0 year 2006 month 10 day03 svn rev39566 language R version.string R version 2.4.0 (2006-10-03) However, this gives all kinds of errors when I run it on a linux box and I am not sure what the error message is telling me. I thought I'd crave your indulgence and ask for advice. m - dbDriver(SQLite, max.con = 25) con - dbConnect(m, dbname=sqlite.db) Error in sqliteNewConnection(drv, ...) : RS-DBI driver: (could not connect to dbname sqlite.db ) version _ platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 2 minor 4.0 year 2006 month 10 day03 svn rev39566 language R version.string R version 2.4.0 (2006-10-03) thanks - the nerdy. _ Share your latest news with your friends with the Windows Live Spaces friends module. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] RSQLite +textConnection()
Hi ! I am trying to read in 1000 really small text files. When on adams, R bails out after reading 125 files with the error message Error in textConnection(readLines(f, n = 2)) : all connections are in use I have traced this to a call to the scan() function which is at that point trying to read tge 126th data file. I have tried specifically closing each connection i open after loading a file to avoid this. But that fails and I get the same error message. I googled and hit on a conversation between Professor Ripley and Dirk Eddelbuettel https://stat.ethz.ch/pipermail/r-sig-db/2006-July/000208.html that talks about a similar problem - there the suggestion made which apparently worked was to fix a function called mysqlImportFile(). But i dont see this function being even in memory now. Peculiarly, I am able to read upto 200 files when i am in windows. I am hoping someone with more expereince with linux and/or RSQLite will have some suggestions. thanks! Alex _ Fixing up the home? Live Search can help __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] RSQLite basic
Hi Seth, I didn't realize that this conversation went off the list with Bentilon. It turns out the source of the problem was that I was trying to write into a linux sub-directory to which I didn't have write permissions. I am able to read and write now using dbWriteTale() thanks for suggesting using sessionInfo() - i didn't know of the command. Al From: Seth Falcon [EMAIL PROTECTED] To: Alexander Nervedi [EMAIL PROTECTED] CC: r-help@stat.math.ethz.ch Subject: Re: [R] RSQLite basic Date: Mon, 27 Nov 2006 16:47:40 -0800 Hi Alexander, Alexander Nervedi [EMAIL PROTECTED] writes: However, this gives all kinds of errors when I run it on a linux box and I am not sure what the error message is telling me. I thought I'd crave your indulgence and ask for advice. m - dbDriver(SQLite, max.con = 25) con - dbConnect(m, dbname=sqlite.db) Error in sqliteNewConnection(drv, ...) : RS-DBI driver: (could not connect to dbname sqlite.db ) What is your working directory when you run this command? getwd() will tell you. You should verify that you have write access there. Does sqlite.db already exist? If so, was it created with a different version of sqlite than you are running? Which brings me to: it would be helpful to see the output of sessionInfo() so we know what versions of DBI and RSQLite you are running. + seth _ Share your latest news with your friends with the Windows Live Spaces friends module. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] RSQLite +textConnection()
They are uptodate. When I run it on windows the i can load upto 200 files, while on Linux it stops after loading 125. From: Seth Falcon [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Subject: Re: [R] RSQLite +textConnection() Date: Mon, 27 Nov 2006 17:22:57 -0800 Alexander Nervedi [EMAIL PROTECTED] writes: Hi ! I am trying to read in 1000 really small text files. When on adams, R bails out after reading 125 files with the error message Error in textConnection(readLines(f, n = 2)) : all connections are in use Please try updating your version of DBI and RSQLite, I believe this has been fixed. + seth __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. _ by Pandora http://radio.msn.com/?icid=T002MSN03A07001 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] dotchart() help
Hi I am having trouble with dotcharts, and I keep getting the error message: Error in Summary.data.frame(..., na.rm = na.rm) : only defined on a data frame with all numeric or complex variables I am sure there is a really simple fix, but I am missing it and I wondered if you may have some advice. Test code from R help works prefectly, but I cant seem to recreate it # example dotchart(VADeaths) VADeaths Rural Male Rural Female Urban Male Urban Female 50-54 11.7 8.7 15.4 8.4 55-59 18.1 11.7 24.3 13.6 60-64 26.9 20.3 37.0 19.3 65-69 41.0 30.9 54.6 35.1 70-74 66.0 54.3 71.1 50.0 # it works with mssing data test -VADeaths test[2,]- NA test Rural Male Rural Female Urban Male Urban Female 50-54 11.7 8.7 15.4 8.4 55-59 NA NA NA NA 60-64 26.9 20.3 37.0 19.3 65-69 41.0 30.9 54.6 35.1 70-74 66.0 54.3 71.1 50.0 dotchart(test) # So i created my own test data test- expand.grid( Educ = c(B, I, A), Prof = c(L, M,C), Blacks = NA, Asian = NA, Hispanic = NA, Native = NA, Female = NA) rownames(test) - with(test, paste(Educ,Prof, sep = -)) test[2:9,3:7] - 2 temp - test[,3:7] temp[1, 2:3] -5 # I want to plot temp which looks like temp Blacks Asian Hispanic Native Female B-L NA 55 NA NA I-L2 22 2 2 A-L 2 22 2 2 B-M 2 22 2 2 I-M 2 22 2 2 A-M 2 22 2 2 B-C 2 22 2 2 I-C 2 22 2 2 A-C 2 22 2 2 dotchart(temp) Error in Summary.data.frame(..., na.rm = na.rm) : only defined on a data frame with all numeric or complex variables Everything in temp is numeric and hence I dont understand the error message. Any leads would be most helpful. thank you Al Nerdy. _ Get the new Windows Live Messenger! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] simple matrix division.
Hi I have x-matrix(c(1,2,3,4), ncol = 2) x [,1] [,2] [1,]13 [2,]24 I'd like these two be divided by their column totals. so 1/3 and 2/3 and 3/7 and 4/7. The obvious x/colSums(x) [,1] [,2] [1,] 0.333 1.000 [2,] 0.2857143 0.5714286 gives me the wrong results for off diagnal ones, since it divides the first row by 3 and second by 7. The inelegant t(t(x)/colSums(x)) [,1] [,2] [1,] 0.333 0.4285714 [2,] 0.667 0.5714286 gives me the right thing. I was wondering if there is any better way of getting what I want. thanks Alex _ Get real-time traffic reports with Windows Live Local Search __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Creating Vectors
Hi all. I have a factor variable distributed over time. I am looking for an elegant way to code duration of a state. Suppose, rainfall.shocks - factor(sample(c(1,2,3), size = 15, replace = TRUE, prob = unit.p), + label = c(Drought, Normal, High)) rainfall.shocks [1] Normal HighHighDrought Normal Normal HighNormal Drought [10] Normal Drought Normal Normal Normal Normal So capture the duration of say drought, I'd need a variable that is able to keep track of rainfall.shocks as well as its past values. I was wondering if there is any obvious way to do this. the Drought variable in this case would have values 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 many thanks for the suggestions you are likely to make. Alexander Nervedi __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] weird error message
Hi! In the example below why is x[[1]] == 0.2237724 false? Alexander Nervedi x - runif(10) x[[1]] [1] 0.2237724 x [1] 0.2237724 0.2678944 0.9375811 0.5963889 0.6180519 0.6449580 0.7308510 [8] 0.7347386 0.4837286 0.1416100 x[[1]] == 0.2237724 FALSE From: Alexander Nervedi [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Subject: Re: [R] Creating Vectors Date: Fri, 30 Jun 2006 21:57:35 + Hi all. I have a factor variable distributed over time. I am looking for an elegant way to code duration of a state. Suppose, rainfall.shocks - factor(sample(c(1,2,3), size = 15, replace = TRUE, prob = unit.p), + label = c(Drought, Normal, High)) rainfall.shocks [1] Normal HighHighDrought Normal Normal HighNormal Drought [10] Normal Drought Normal Normal Normal Normal So capture the duration of say drought, I'd need a variable that is able to keep track of rainfall.shocks as well as its past values. I was wondering if there is any obvious way to do this. the Drought variable in this case would have values 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 many thanks for the suggestions you are likely to make. Alexander Nervedi __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] contour help
Hi I'd like to draw some level plots but I just cant for the live of me figure out how to control the axis here. The axis for both the contour plots below appear to be the same, although one is a subset of the other. I was wondering how I could explicitly specify the xand y axis locations here. al dat-matrix(runif(50)*20, ncol = 5) contour(dat) contour(dat[1:2, 1:2]) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] contour help
Hi I'd like to draw some level plots but I just cant for the live of me figure out how to control the axis here. The axis for both the contour plots below appear to be the same, although one is a subset of the other. I was wondering how I could explicitly specify the xand y axis locations here. al dat-matrix(runif(50)*20, ncol = 5) contour(dat) contour(dat[1:2, 1:2]) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] boxplot group labels
Hi All, I would like to control the order in which my boxplots are drawn. When i issue the lines below I find that group a get plotted lowest, while the highest letter grade is plotted on the top. I want to plot the letter grades in descending order and I was wondering if tere is a quick way to do that. thanks. Alex. play - data.frame(code = letters[round(runif(100)*10+1)], income = runif(100)) with(play, boxplot(income~code, horizontal = TRUE, boxwex = 0.1)) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] function to collapse data by factor/group
Dear R-users,
are there pre-programmed packages that implement integer maximization? A
preliminary google search didnt uncover anything that seemed to match.
I want to solve something like Max{U(x) + beta*U(x+y)} with respect to y,
where y can take only integer values.
thanks.
Alnuddy
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[R] R.matlab anyone ?
Hi
I have some code up and runnning in Matlab and need it for some stuff better
handled in R. So R.matlab sounded terrific. However, I am having trouble
getting it to go.
I am using R v 2.2.1 (i know i know i need to upgrade), and Windows XP and
Matlab 6.0.0.88 (R12).
here is what I get.
# in R GUI
library(R.matlab)
Loading required package: R.oo
R.oo v1.1.6 (2006-04-03) successfully loaded. See ?R.oo for help.
R.matlab v1.1.1 (2006-01-21) successfully loaded. See ?R.matlab for help.
Matlab$startServer()
Loading required package: R.utils
R.utils v0.7.7 (2006-03-30) successfully loaded. See ?R.utils for help.
[1] 0
#
However, Matlab does open up on seperate window, but with an error message.
This reads,
To get started, type one of these: helpwin, helpdesk, or demo.
For product information, visit www.mathworks.com.
??? Error: File: C:\R\R-2.2.1\MatlabServer.m Line: 109 Column: 45
) expected, identifier found.
So I went to MatlabServer.m and found that
108 if (port 1023 | port 49151)
109 error('Cannot not open connection. Port ('MATLABSERVER_PORT') is out of
range [1023,49151]: %d', port);
110 end
(the numbers are the line numbers). my guess is that I haven't been able to
connect and the 0 i see from within R is a sign of this. Can anyone advice
me as to what is going on. I feel there is something missing - i can get the
matlab command window to come up but the connection i guess is not
there.
Any ideas would be really helpful.
Alex.
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[R] function to collapse data by factor/group
Hi is there an R equivalent of the Stata collpase command? suppose i have: classes - 1:5 schools - letters[1:5] stud - 1:10 dat - expand.grid(School = schools, Grade = classes, Student.ID = stud) with(dat, table(Student.ID, School)) dat$marks - rnorm(nrow(dat), 50, 25) I want to get the mean score by school and class while the data is at the school-class-student level. I could write something up but I was wondering if there is already something otu there. Alex __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] mle package
Hi ! There used to be a package called mle for maximum likelihood estimation. I couldn't find it when I tried to get the package. Is this still available? Perhaps under another package? I'd appreciate any suggestion on this. Alex __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] cloud() works but wireframe() is blank
I have to be making a riddiculously silly ommission. when I run the fillowing i get the cloud plot ok. But I cant figure out what I am missing out when I call wireframe. Any help would be appreciated. x-runif(100) y-rnorm(100) z-runif(100) temp -data.frame(x,y,z) wireframe(x~y*z,temp) cloud(x~y*z,temp) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] plot control
Dear R gurus, I'd like to plot a distribution with the tickmarks always at the quantiles of the y-axis, as opposed to the quantiles of the distribution I am plotting. plot seems to place these ticks based on some calculations that I cant see (?plot doesnt show the innards of plot). Below is some functional code, but the tick marks are placed unattractively since I am referencing the quantiles of the distribution. I'd ideally like the tickmarks to be able to reference fixed points on the y-axis and the show the associted values. I'd be very grateful for ideas, suggestion and leads. - alex. # some code y1-rnorm(100) y2-runif(100) x -1:100 l -length(y1) mat-scale(cbind(y1,y2)) plot(x, mat[,1], col = blue, yaxt = n, ylab=) axis(2, at = sort(mat[,1])[c(0.25*l,0.5*l,0.75*l)], labels = round(sort(y1)[c(0.25*l, 0.5*l,0.75*l)],2)) points(x, mat[,2], col = red) axis(4, at = sort(mat[,2])[c(0.25*l,0.4*l,0.75*l)], labels = round(sort(y2)[c(0.25*l, 0.5*l,0.75*l)],2)) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] another memory size question
Hi. I am having trouble figuring this out. Please help if you know what I am goffing up on. rm(list=ls(all=TRUE)) dat-expand.grid(village.code = c(1,2,3), household.id = 1:99, member.id = 1:41, year.code = 75:85, DOI = 1:366) Error: cannot allocate vector of size 191502 Kb memory.limit() [1] 3145728000 Shouldn't I have ample memory to greate this gigantic grid? mucho gracias el signors and signioritas, Alnerdy _ Dont just search. Find. Check out the new MSN Search! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Binning question (binning rows of a data.frame according toa variable)
I dont as yet fully understand how trellis works. Advice would be much
appreciated.
I have a factor variable (2 levels) and a continuous variable and I am able
to plot a histogram of the frequencies of the continuous variable for each
level of the factor variable using :
histogram( ~ class | one, data = data,
xlab = Grades, type = density,
panel = function(x, ...) {
panel.histogram(x, ...)
panel.mathdensity(dmathjavascript:G('/cgi-bin/hmhome?');
Today = dnorm, col = black,
args = list(mean=mean(x),sd=sd(x)))
The two distributions overlap over an area and I would like to draw vertical
lines to demark the lower tail of the distribution which has a higher
median, and the right tail of the distribution with lower median.
Any suggestion would be really helpful.
thanks
ul-nadi
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[R] trellis help
apoplogies for the repeat post - i just realized i forgot to change the
subject line
I dont as yet fully understand how trellis works. Advice would be much
appreciated.
I have a factor variable (2 levels) and a continuous variable and I am able
to plot a histogram of the frequencies of the continuous variable for each
level of the factor variable using :
histogram( ~ e.ps | vdc, data = est.prop.score,
xlab = Propensity Score, type =
density,
panel = function(x, ...) {
panel.histogram(x, ...)
panel.mathdensity(dmath = dnorm, col =
black,
args = list(mean=mean(x),sd=sd(x)))
The two distributions overlap over an area and I would like to draw vertical
lines to demark the lower tail of the distribution which has a higher
median, and the right tail of the distribution with lower median.
Any suggestion would be really helpful.
thanks
ul-nadi
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[R] Map archives
Hi R Map packages users. I just drew my first few plots using map() and am trying to see if I can configure it to my needs. Are there any known archives out there from where I can get additional data files for the map library to read? I am specifically look for sub-district level administrative boundary lines for Madhya Pradesh, India. Kind of like county lines I guess. thanks. Aleks __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] collocation methods
Hi All, I have found the function poly(), that computes orthogonal polynomials. I was wondering if there are users of this function on the list. What kind of an orthognal polynomial is this fititng ? Is it, for example, least square, galerkin, or collocation ? It references Chambers and Hastie, and Kennedy and Gentle, but I dont have access to either. thanks Alex __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] collocation methods
Hi R Users, I have been trying to google (in general and specifically r-project) to see if I can find listing that may point me to understand the state of the art in R for functional approximation. Unfortunately, I have been unable to find anything concrete. I hope I am missing something, and hence this message. Are there packages out there that may implement collocation. Specifically I am trying to implement Chebychev polynomial approximations. Much more generally, has the R-management thought of some kind of encycopaedia that will allow developers/users to figure out what kinds of different routines are implemented and packaged under different packages? thanks, currently, R Neeu B. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
