similar to: Subset of Data Frame using the date

Hi, folks, Finally Friday~~ Here comes the question: x=c('germany','poor italy','usa','england','poor italy','japan') y=c('Spain','germany','usa','brazil','england','chile') s=1:6 z=3:8 test=data.frame(x,y,s,z) #Now I only concern the countries ('germany','england','brazil').

Given: > mitest <- matrix(1:16,ncol=4) > dimnames(mitest)[[1]] <- c("a","b","c","d") > dimnames(mitest)[[2]] <- c("a","b","c","d") > mitest a b c d a 1 5 9 13 b 2 6 10 14 c 3 7 11 15 d 4 8 12 16 I can do: > mitest[cbind(c(1,2,3),c(2,3,2))] [1] 5 10 7 but using the names does not

Hi, I have a table of x rows and y columns. The table is huge and so i'd like to create a subset of the data containing rows where any of the y values are below a threshold, say 1e-4. Is there a simple way of doing this in R? thanks Rich

Dear R users, Plotting question from a R beginner... When I try to plot a response through time, for example: >Date<-c("2006-08-17", "2006-08-18", "2006-08-19", "2006-08-20") >response<-c(4,4,8,12) >as.Date(Date) >plot(Date,response) The dates on the graphic appear in spanish. This I guess is the default way of plotting because my

Hi all, I am not a skillful R programmer and has I am handling with large dataframes (about 30000 x 300) I am in need of an efficient function. I have 4 dataframes with the same dimension. I need to generate other dataframe with the some dimension than the others where in each position it has the median value of the 4 values in the same position coming from the 4 dataframes. Grateful by your

Hello I have a data frame d with columns "var1", "var2", "var3" Then I have two vectors: columns <- c("var2", "var3") values <- c(0, 1) Is there a compact way to subset the data frame using these two vectors and get the result equivalent to: select (d, var2==0 & var3==1) ? Thank You Blazej

I want to create a list based on the information from a data.frame, Model. So I tried the following: MyList <- list(colnames(Model)[2] = levels(Model$(colnames(Model)[2]))) but it failed with an error: Error: unexpected '=' in "list(colnames(Model)[2] =" I have the following problems with this command line: (1) I wanted to use colnames(Model)[2] as a tag for the list:

Hello, One more question.. I have the data.frame "pop": xloc yloc gonad ind Ene W Area 1 23 20 516.74 1 0.02 20.21 1 2 23 20 1143.20 1 0.02 20.21 1 3 23 20 250.00 1 0.02 20.21 1 4 22 15 251.98 1 0.02 18.69 2 5 22 15 598.08 1 0.02 18.69 2 6 21 19 250.00 1 0.02 20.21 3 7 22 20 251.98 1

Dear all, I have a data frame 'myDf', in which one of the fields 'myField' can have several possible values. To extract the observations for which it has value "A", I can do: subset(myDf, myField="A") However, when I try to do this within a loop, it doesn't work, it returns everything, and not a subset for (currField in c("A", "B",

Hi, I am using this subset statement and it works outside a function. LIS[[i]]<- lapply(LI, subset, select=cov[[i]]) However, wrapped inside a function this statement produces the same values for every LIS[[1]] which is only the first subset of LI. Does anyone know why is not working correctly inside a function? ff = factor(covariate) nLev <- nlevels(ff) cov <-

Hello R listserve, I would appreciate someone's help with this problem. Consider the following toy dataset: x <- read.table(textConnection("worldclim.1 worldclim.2 cru.1 cru.2 indv.1 7 8 32 658 indv.2 7 7 39 422"), header = TRUE) How could I create a subset of the data based on the column prefix? For instance, let's say I wanted to subset only the columns with the

Dear list: I ask for your help in a simple problem in which I'm not figuring out the solution My data looks like: dat<- data.frame(date=c("12/12/1980", "03/11/1994", "15/11/1999", "31/10/2000", "20/03/2007", "05/01/2001"), var1=c("A", "A", "B", "D", "C", "A"),

Hi, when I use use subset in a data.frame, all empty levels are maintained in the new table. > test <- data.frame(a=as.factor(rep(c("f1","f2","f3"),10)),b=rep(c(1,2,3),10)) > summary(test) a b f1:10 Min. :1 f2:10 1st Qu.:1 f3:10 Median :2 Mean :2 3rd Qu.:3 Max. :3 > test2 <-

Suppose my data looks like this: Obs, Male, Female, Height 1, T, F, 66 2, F, T, 64 3, T, F, 59 4, T, F, 55 5, F, T, 62 6, T, F, 67 7, T, F, 58 8,

Dear all, Lets say I have a data frame as follows: > Date <- as.Date(c('2006-08-23', '2006-08-30', '2006-09-06', '2006-09-13', '2006-09-20')) > Income <- c(73.79, 72.46, 76.32, 72.43, 72.62) > data.frame(Date, Income) Date Income 1 2006-08-23 73.79 2 2006-08-30 72.46 3 2006-09-06 76.32 4 2006-09-13 72.43 5 2006-09-20 72.62 >

Hello, I have a data frame of the following form block trial dv 1 1 10 1 1 11 1 1 9 1 2 12 1 2 9 1 3 12 1 3 13 1 3 14 1 3 15 1 4 12 1 4 11 1 4 10 1 4 9 1 4 11 and need to number the rows consecutively in the following manner block trial dv sequ 1 1 10 1 1 1 11 2 1 1 9 3 1 2 12 1 1 2 9 2 1 3 12 1 1 3 13 2 1 3 14 3 1 3 15 4 1 4 12 1 1 4 11 2 1 4 10 3 1 4 9 4 1 4 11 5 Any idea how to solve

Hello, I have a sequence of numbers: seq(1:50) and I would like to have all the possible combinations with this numbers without repeating any combination: 11, 12, 13, ... ,22,23,24,... How can I do it? Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona Edifici V, Campus UAB 08193 Cerdanyola del Vall?s-

Hi, dear R-helpers, I have a simple question regarding selecting subset of a variable based on another variable. Here is the example: xx=rnorm(10) id=sample(1:10, 10) temp=c(6, 1, 8, 2) Now, all I want is xx's that their id are 6, 1, 8, 2, instead of the position. Any suggestions ? Thank you all your help !! Carrie [[alternative HTML version deleted]]

Hi, Is there are function similar to excel vlookup in R. Please let me know. Thanks, Sachin ____________________________________________________________________________________ [[alternative HTML version deleted]]

Hi, I have a data frame with two columns: dt and tf. The dt column is datetime and the tf column is a temperature. dt tf 1 2009-06-20 00:53:00 73 2 2009-06-20 01:08:00 73 3 2009-06-20 01:44:00 72 4 2009-06-20 01:53:00 71 5 2009-06-20 02:07:00 72 ... I need a subset of the rows where the minutes are 53. The hour is immaterial. I can not find a wildcard