similar to: Maximum number of tables combined with rbind

Hello, First of all, I'm new to R and I don't have anyone who already knows the language to ask for tips, so please excuse my ignorance. I'm trying to download data direct from the Federal Reserve statistics website and graph it, using the following: #This downloads the data from the Fed website

Hello, Is there a command for freeing up the memory used by R in holding data tables? The structure of the procedure I have is as follows: 1) Read multiple txt files in using read.table(...). 2) Combine the read tables using rbind(...). 3) Attach the data using attach(...) and then use do a multiple regression using lm(...). So far so good, but when I then perform a further regression by

Hello, I have been using a very simple rbind approach (simple enough for me to understand) to combine data files within R. It seems to work fine, but then generates warning messages for reasons that I can't begin to understand. The text below shows the issue. testread12=read.table("C:/Files/Test100.txt", head = T) testread11=read.table("C:/Files/Test101.txt", head =

Hi All, In another thread Andy Liaw, who CRAN lists as locfit maintainer; said: <quote> From: "Liaw, Andy" <andy_liaw at merck.com> To: "Guy Green" <guygreen at netvigator.com>; <r-help at r-project.org> Subject: Re: Alternatives to linear regression with multiple variables Date: 22 February 2010 17:50 You can try the locfit package, which I believe

I want to put the "plus or minus" symbol into a character variable, so that this can be turned into a factor and be displayed in the "strip" of a faceted ggplot2 plot. A very nice solution, thanks to Professor Ripley's post of Nov 16, 2008; 3:13pm, visible at http://r.789695.n4.nabble.com/Symbols-to-use-in-text-td874239.html and subsequently

Full_Name: Gerald Guglielmo Version: 2.8.1 (2008-12-22) OS: OSX Leopard Submission from: (NULL) (131.225.103.35) When I attempt to use the hist() function to bin integers the behavior seems very odd as the bin boundary seems inconsistent across the various bins. For some bins the upper boundary includes the next integer value, while in others it does not. If I add 0.1 to every value, then the

i have the following constructed and running very well,, thanks to Gabor Grothendieck for his help. >data.info <- c("station.id", "year", "date", "max.discharge") > > for(i in 1:num.files) { + station.id <- substring(data[i], 1,8) + DF <- read.table(data[i], sep=",", blank.lines.skip = TRUE) + z <- zoo(DF[,4],

I often need to "combine" data frames, sometimes "vertically" and other times "horizontally". When it "better" to use merge? When is it better to use rbind or cbind? Are there clear pros and cons of each approach? --------------------------------- [[alternative HTML version deleted]]

Hi! I''m testing Puppet 2.6 and got all the basic stuff working with the default webricks. I read that it doesn''t scale very well and is not suited for production environments and the recommended setup is Apache/ Passenger. Is there a step-by-step-guide on how to set it up? Any help is very appreciated. Regards, Freddie -- You received this message because you are subscribed

>From a small thread over at the 'R-package-devel' mailing list, this now goes to the R-devel mailing list (CC'ing the original R-package-devel very exceptionally). Note that I, as maintainer("Matrix") had introduced rBind() and cBind() to be used for Matrix package matrices as substitute for rbind() and cbind() because back then it was not reasonably possible to

Have finally managed to come up with a fix after checking out sys.calls() from within the as.Date.IDate debugger, which shows something like: [[1]] rbind(DF, DF) [[2]] rbind(deparse.level, ...) [[3]] `[<-`(`*tmp*`, ri, value = 18042L) [[4]] `[<-.Date`(`*tmp*`, ri, value = 18042L) [[5]] as.Date(value) [[6]] as.Date.IDate(value) I'm not sure why [<- is called, I guess the

I'm not sure whether or not this is a bug, but I did isolate the line where the error is thrown: src/library/base/R/dataframe.R:1395. https://github.com/wch/r-source/blob/01374c3c367fa12f555fd354f735a6e16e5bd98e/src/library/base/R/dataframe.R#L1395 The error is thrown because the line attempts to set a subset of the rownames to NULL, which fails. R> options(error = recover) R>

Hi, This has bugged me for a bit. First question is how to keep classes with rbind, and second question is how to properly return vecotrs instead of lists after turning an rbind of lists into a data.frame list1=list(a=2, b=as.Date("20090102", format="%Y%m%d")) list2=list(a=2, b=as.Date("20090102", format="%Y%m%d")) rbind(list1, list2) #this loses the

The R help for cbind/rbind states: > For `cbind' (`rbind'), vectors of zero length are ignored unless > the result would have zero rows (columns), for S compatibility. > (Zero-extent matrices do not occur in S and are not ignored in R.) I presume this means the S language as defined in the Blue Book ("The ^New S Language", Becker Chambers & Wilks,

Consider the following, which is new behaviour under R 2.5+: > df1 <- data.frame( x=2, y='cat') > df2 <- data.frame( x=3, y='dog') > rbind( df1[-1,], df2)$y == rbind( df1, df2)[-1,]$y Error in Ops.factor(rbind(df1[-1, ], df2)$y, rbind(df1, : Level sets of factors are different To me this seems illogical; it shouldn't matter whether you remove

On Sat, Jan 24, 2015 at 12:58 AM, Mario Annau <mario.annau at gmail.com> wrote: > Hi all, > this question has already been posted on stackoverflow, however without > success, see also > http://stackoverflow.com/questions/27886535/proper-way-to-use-cbind-rbind-with-s4-classes-in-package. > > I have written a package using S4 classes and would like to use the > functions

On Sun, May 26, 2019 at 6:47 AM Joshua Ulrich <josh.m.ulrich at gmail.com> wrote: > > On Sun, May 26, 2019 at 4:06 AM Michael Chirico > <michaelchirico4 at gmail.com> wrote: > > > > Have finally managed to come up with a fix after checking out sys.calls() > > from within the as.Date.IDate debugger, which shows something like: > > > > [[1]]

The existing behaviour seems inutitive to me. I would consider these invariants for n vector x_i's each with size m: * nrow(rbind(x_1, x_2, ..., x_n)) equals n * ncol(rbind(x_1, x_2, ..., x_n)) equals m Additionally, wouldn't you expect rbind(x_1[i], x_2[i]) to equal rbind(x_1, x_2)[, i, drop = FALSE] ? Hadley On Thu, May 16, 2019 at 3:26 PM Gabriel Becker <gabembecker at

Dear R-devel - I noticed that when I rbind two data.frames together, factor variables lose their attributes in the resulting data.frame while numeric variables do not. As an example, create two data.frames, t1 and t2, with two variables each. Give each variable an attribute called "label", and then perform the rbind and look at the resulting structure. #### EXAMPLE R CODE #####

"Not that it really matters, but" Can someone explain how the row numbers get assigned in the following sequence? It looks like something funky happens when rbind() coerces 'bar' into a dataframe. In either sequence of rbind below, once you get past the first two rows, the row numbers count normally. Rgames> (foo<-data.frame(x=5,y=4,r=3)) x y r 1 5 4 3 Rgames>