similar to: is match slow?

I've writen this function (imagenrgb) to display a (m,n,3) array as a RGB image with ngris^3 colors and,optionally, stretching. If option ver=F, it does not display but saves a pseudocolor version of the image as a list (so that subsequent displays are faster). I'd appreciate feedback and improvements and hope that it's useful for others. Example of use: > dim(imatest) [1] 100

Hi! Given a vector (or a factor within a df),i.e. v1 <- c(1,1,1,2,3,4,1,10,3) and a dictionary cbind(c(1,2,3),c(1001,1002,1003)) is there a function (on the same line than recode() in car) to get v2 as c(1001,1001,1001,1002,1003,4,1001,10,1003) ? I'm using myself a function based on match() since long ago (I think that thanks to advice by Prof. B. Ripley), but would like to know if there

Hello, I was playing around with the newly implemented 'incomparables' argument in 'match' and realized the argument does not behave anything like I expected. Can someone explain what is going on here? Sorry if I'm misreading the documentation. > match(1:3, 1:3, incomparables=1) [1] NA 2 3 # This seems right, the 1 in 'x' is 'incomparable' >

Full_Name: Wacek Kusnierczyk Version: 2.8.0 and 2.10.0 r48242 OS: Ubuntu 8.04 Linux 32 bit Submission from: (NULL) (129.241.110.161) In the following code: duplicated(data.frame(), incomparables=NA) # Error in if (!is.logical(incomparables) || incomparables) .NotYetUsed("incomparables != FALSE") : # missing value where TRUE/FALSE needed the raised error is clearly not the

I came across the below mis-feature/bug using match with POSIXlt objects (from strptime) in R 2.11.1 (though this appears to be an old issue). > x <- as.POSIXlt(Sys.Date()) > table <- as.POSIXlt(Sys.Date()+0:5) > length(x) [1] 1 > x %in% table # I expect TRUE [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE > match(x, table) # I expect 1 [1] NA NA NA NA NA NA NA NA

Hello everyone, I have a question on isoMDS. My data set (of vegetation) with 210 samples is in this way: Rotfoehrenau Lavendelweidenau Silberweidenau .... 067_Breg.7 0 2 0 .... 071_Dona.4 0 2 6 .... ... I want to do an isoMDS-analysis with the dissimilarity index

Hi, On 01/23/2015 07:01 AM, luke-tierney at uiowa.edu wrote: > On Thu, 22 Jan 2015, Michael Lawrence wrote: > >> On Thu, Jan 22, 2015 at 11:44 AM, <luke-tierney at uiowa.edu> wrote: >>> >>> For default methods there ought to be a way to create those so the >>> default method is computed at creation or load time and stored in an >>>

Buenas tardes a todos los participantes del foro. Me dirijo a vosotros porque estoy atascado con una duda de programación respecto al data frame: > dd # Data frame de 5 variables, leído de un archivo txt id sexo nacim origen final 1 1 0 02/09/1955 01/04/1985 01/02/2014 2 2 1 29/10/1951 15/08/1996 01/05/2009 3 3 0 30/10/1942 02/08/2000 01/02/2014 4 4 1

Hi, Summary: I ran into some unexpected behavior in approx() and tapply() that introduced NA's in "clean" data due to (?) numerical accuracy/round off. The culprit seems to be in match() that coerces it's arguments to character, loosing precision in the process. [R development version 1.2.0, 08 Nov 2000, on Linux] Example: > r > [1] 0.6931472 0.6931472 0.6931472

Hi, Summary: I ran into some unexpected behavior in approx() and tapply() that introduced NA's in "clean" data due to (?) numerical accuracy/round off. The culprit seems to be in match() that coerces it's arguments to character, loosing precision in the process. [R development version 1.2.0, 08 Nov 2000, on Linux] Example: > r > [1] 0.6931472 0.6931472 0.6931472

I've found the following and I'm kind of confused: > summary(delme) Min. 1st Qu. Median Mean 3rd Qu. Max. 1 2950 5699 5756 8572 11680 > range(delme) [1] 1 11675 summary() and range() give different Max. value for the same vector! Agus Dr. Agustin Lobo Instituto de Ciencias de la Tierra (CSIC) Lluis Sole Sabaris s/n 08028 Barcelona SPAIN tel

I have to store a number of vectors of the same length. I know the length but I do not know the number of vectors. How can I store them as they are created (they are created one by one)? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or

Muchas gracias Miguel. Os pongo mi solución por si alguien necesita llamar a distintos tipos de sistema. setwd("C:/Users/usuario/Desktop/Pruebas/") x <- sessionInfo() sistema <- substr(x$R.version$system,1, 3 ) origen <- "Carp" destino <- "Carp235" switch(sistema, x86 = system(paste(Sys.getenv("COMSPEC"),"/c

Professor Ripley thanks for this. Very much appreciated. The original subject line reflected my late-night conviction that the answer might involve passing a strange list to do.call(). Anyway, package magic is broken (only in R-devel, I might add) because I have a function called "%eq%". R-2.0.0 CMD check is stopping (I think) because it interprets the "%" as a

Buenas, Sigo aprobechando par aaprender en las vacaciones de alumnos y nuevamente recurro a Uds. Sé que la perspectiva puede ser erronea, o sea que les pido que entiendan lo que quiero decir, más que lo que digo. Tengo una lista de matrices todas de idénticas dimensiones, y necesito hacer operaciones entre ellas. Ocurrencia: creí que podría hacer un array, de tal manera que , así como puedo

Muchas gracias, Javier, por tu respuesta. Me sobrevalorás. Mi última clase de matemática como tal fue en 4º de secundaria, y era la matemática que nos daban a los de letras. Ni te cuento hace cuántos años. No puedo seguir la mayoría de lo que comentás sin hacer un trabajo forense. Así que agarré lo que entendí... y me parece que, o lo que yo quiero hacer son matrices de tres dimensiones (si es que

Iba a proponeros una solución con switch, pero algo raro ocurre con el comando system en windows no me hace caso system("dir") por ejemplo no muestra nada en pantalla. > sessionInfo()R version 2.15.2 (2012-10-26) Platform: x86_64-w64-mingw32/x64 (64-bit) locale: [1] LC_COLLATE=Spanish_Spain.1252 LC_CTYPE=Spanish_Spain.1252 LC_MONETARY=Spanish_Spain.1252 LC_NUMERIC=C [5]

Hola a todos: La pregunta ha quedado clara en el asunto, pero: ¿existe alguna función que convierta un objeto temporal (TS) a matriz o data.frame? En algunos cálculos que estoy haciendo me viene bien convertir un objeto temporal a matriz para poder hacer cálculos parciales por meses o años (aplicando apply en la matriz) pero no he encontrado ninguna función que haga la conversión. He

Hola, Emilio Muchas gracias por la respuesta. El problema es que la otra persona no sabe nada de R, e instalarle RStudio va a ser casi peor. Además, parece que el origen es que tiene su Mac con configuración USA por un tema de correos y fechas; así que creo que lo que necesitaría es algo que cambie solo la configuración de la sesión de R a UTF-8 o algo parecido. Quizás no es posible ....

On Thu, Jan 22, 2015 at 11:44 AM, <luke-tierney at uiowa.edu> wrote: > > For default methods there ought to be a way to create those so the > default method is computed at creation or load time and stored in an > environment. We had considered that, but we thought the definition of the function would be easier to interpret if it explicitly specified the namespace, instead of