similar to: Can R handle large dataset?

Displaying 20 results from an estimated 3000 matches similar to: "Can R handle large dataset?"

2007 Apr 04
6
transition matrices
I am working with transition matrices of sequences of animal behaviours. What I would like to do is parse the original matrices, adjusting row/column order so that the matrix has its main values in blocks surrounding the diagonal. This would cause behaviours involved in functional groupings (e.g. grooming, resting, foraging etc) to appear as blocks. This can be done manually by applying
2007 Jan 01
4
if ... problem with compound instructions
I am having problems with the 'if' syntax. I have an n x 4 matrix, X say. The first two columns hold x, y values and I am attempting to fill the second two columns with the quadrant in which the datapoint (x, y) is and with the heading angle. So I have two problems 1) how to do this elegantly (at which I've failed as I can't seem to vectorize the problem) and 2) how to
2007 Oct 03
2
Windows OS, R and unicode
I'm trying to use the biological female and male signs in R2.5.1 under Windows XP. I can access and insert these symbols using word-processors. In general these should be available as \u2640 and \u2642 but I can't make them happen in R using (say) text(5,5, "\u2640") message "invalid \uxxxx sequence" I've replaced Arial with Arial unicode MS in Rdevga and
2008 Aug 15
1
RODBC-sqlSave questions
Hello, I have 4 data frames, say A, B, C, D. Each A, B, C has different columns set, and D has all of what A, B, and C have. So, here is the example: A has c1, c2, and c3 B has c4 and c5 C has c1, c5, and c6 D has c1, c2, c3, c4, c5, and c6. I want to load these data frames into an Oracle SQL server. I am using RODBC with sqlSave, and managed to load D. But when I tried to load the other data
2008 Oct 14
1
abline and locator?
Hi, I'd like to plot vertical lines on my plot using the locator.But since locator returns two values I end up getting 2 vertical lines for every click.Is there some way only the x coordinate from locator can be returned? -- Rajesh.J ------------------------------------------------------------ "I skate to where the puck is going to be, not where it has been." - Wayne Gretzky
2008 Mar 03
2
Problem with PCA
I have an exercise. With 3 kinds of yohourt a,b,c. There are 25 participatients estimate 3 norms: taste (va,vb,vc), structure (ca,cb,cc) and price (ga,gb,gc) and give the mark from 1 to 5. I don't know how to PCA this data. Please help me! I attached the data file follow: Va Vb Vc Ca Cb Cc Ga Gb Gc 4 2 4 5 5 5 4 4 2 2 2 4 3 2 5 4 5 1 2 2 1 2 3 3 3 1 4 1 1 2 2 3 3 4 3 2 3 4 4 4 3 1 2 1 2 1 1 1
2008 Mar 31
1
solver in R
Dear R-users, Is there any function in R that works similarly like solver in Excel. I have a set of daily rainfall data and I would like to estimate alpha and beta for the gamma function. Here is my daily rainfall data: [1] 0.2 1.2 0.0 0.0 0.0 0.0 0.0 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.8 1.6 0.0 1.8 1.8 0.0 2.6 [24] 33.0 19.0 0.0 0.0 0.6 0.0 0.0 6.8 0.2 0.0
2008 Oct 14
4
problem using R
Hi , I am having serious trouble doing this homework. I am using R for doing the homework. I am having the following specific problem: a) when I input the data using the command > Wbdc <-read.table("wdbc.txt")? I do not see the data. b) When I want to run histogram using command > hist(area) I get an error message, Error in hist(area) : object "area" not found. ? I am
2002 Oct 25
4
points on a sphere
Not an R question directly, but has anyone got a method for placing a moderately large number of (near) equi-spaced points on a sphere? I have a nasty feeling platonic solids are needed for exact solutions and I'm thinking of samplings involving around 200 - 1000 regularly-spaced points, Thanks, Richard Rowe Richard Rowe Senior Lecturer Department of Zoology and Tropical Ecology, James
2002 Dec 08
1
color of plot axes involving POSIX types
I am attempting to plot frequency of occurrence against (calendar) time. As the output is to be produced as a Powerpoint picture on a dark background I wish to make the plot output yellow > par(col="yellow", col.axis="yellow", col.lab="yellow", col.main="yellow") > plot(t2, t1, ylim=c(0,40), main="Episynlestes run 2",
2008 May 03
4
interactive rotatable 3d scatterplot
I would like to create a 3d scatterplot that is interactive in the sense that I can spin it on its axes to better visualize some PCA results I have. What are the options in R? I've looked at RGL and perhaps it will suffice but it wasn't apparent from the documentation I found. Any demo scripts available for a package that will work? Mark -- Mark W. Kimpel MD ** Neuroinformatics **
2002 Jul 22
2
finding the colour at a point
I think this was asked recently but I can't find the item. Is it possible to find the colour at a point on a graphics page? I want to estimate the area of a complex shape by colouring it then random sampling from an enclosing box ... Richard Rowe Richard Rowe Senior Lecturer Department of Zoology and Tropical Ecology, James Cook University Townsville, Queensland 4811, Australia fax (61)7
2002 May 16
3
Wind rose plots?
Just out of curiosity, has anyone created wind roses using R? Thanks. Tosh -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
2002 Nov 09
2
importing data from Excel using RODBC
Hi, I used RODBC to import data from an Excel spreadsheet "*.xls", but some columns were returned as zeros. When I looked at these columns in Excel, I found that thery are results of formula calculations and not entry. My question is: Is there any parameter or command I need to use in order to overcome this problem? Thank you Ahmad Abu Hammour
2001 Mar 04
2
.Random.seed(0) is not a valid Normal type
Dear R-Developers and -Community, after compiling and installing R 1.2.2., I started 'demo(graphics)' for a test, and got: 'Error in rnorm(0): .Random.seed(0) is not a Normal type' Obviously .Random.seed was not initialized appropriately. Following the the documentation for '.Random.seed' [see below 'Examples'], this can be fixed rm(.Random.seed);
2001 Dec 11
1
Paid support for R?
Dear R users, Sorry if this has been discussed before. I was recently looking at the MySQL site and saw that they offer various levels of paid support. The support options range from basic email support (USD200) through to extensive telephone support from the development team (USD10000). These are annual prices. This is something I would be happy to see available with R (maybe it is?). My
2005 Aug 08
2
extract t-values from pairwise.t.test
Hi, how can I extract the t-values after running a pairwise.t.test? The output just list the p-values. Many thanks for your help. Cheers Guido ____________________________________ Guido J. Parra School of Tropical Environment Studies and Geography James Cook University Townsville Queensland 4811 Phone: 61 7 47815824 Fax: 61 7 47814020 Mobile: 0437630843 e-mail:
2002 May 11
2
RODBC sqlFetch
Hi, Thanks for showing me how to use RODBC and odbcConnect. Now works nicely. The question I've got now is: noms <- list.files(pattern=".DBF") # removing extension names: noms <- sapply(noms, function(x) as.character(strsplit(x,".DBF")) , USE.NAMES=F) for (i in 1:length(noms)) { s <- sqlFetch(bdades, noms[i]) # etc. } But it seems that sqlFetch()
2003 Apr 18
3
superimposing graphs
Dear People, I have a data set of data x from a probability distribution, and I have a function, mydensity, of the pdf of that distribution. I'm asking for help in superimposing the histogram of x and the plot of mydensity. In the function below, I call truehist and curve, but these are plotted in different figures. I'd like them to be plotted on the same figure, and to use common
2003 Jul 16
2
Stem and leaf display?
I would like to do some fairly basic stem-and-leaf displays in R. I am aware (I might even say painfully aware) of stem(base) and have tried it. That's why I'm hoping someone has a usable stem- and-leaf display for R so that I don't have to write my own. r-project.org > Search > R Site Search > "stem and leaf display" finds nothing. I also tried the mail archive