similar to: Data Structure to Code

data(AirPassengers) brings AirPassengers into the workspace. How can I  idenfity what the structure of AirPassengers is? Is it a data.frame, a table etc. etc. [[alternative HTML version deleted]]

This is copy & paste from my session: > xyz<-as.vector(c(ls(),as.matrix(lapply(ls(),class)))) > dim(xyz)<-c(length(xyz)/2,2) > > allobj<-function(){ + xyz<-as.vector(c(ls(),as.matrix(lapply(ls(),class)))); + dim(xyz)<-c(length(xyz)/2,2); + return(xyz) + } > xyz       [,1]              [,2]        [1,] "a"               "character"  [2,]

Given a<-"c(1,2,3,4,5)" How can  I evaluate the variable a to return a (numeric) vector comprising of 1,2,3,4,5? Thanks. [[alternative HTML version deleted]]

The "R Language Definition" at http://cran.r-project.org/doc/manuals/R-lang.html states in the following section 4.3.2 Argument matching This subsection applies to closures but not to primitive functions. What are 'closures'? [[alternative HTML version deleted]]

Given dayOfWeekName<-c("Mon","Tue","Wed","Thu","Fri","Sat","Sun"); dayOfWeekOrdinal<-c(1,2,3,4,5,6,0); dayOfWeekWorkDay<-c(TRUE,TRUE,TRUE,TRUE,TRUE,FALSE,FALSE); weekProfile<-list(dow=dayOfWeekName,dowI=dayOfWeekOrdinal,dowW=dayOfWeekWorkDay) 1. How can I conditionally get dow, dowI, and dowW from weekProfile?

I am looking for a means to call Win32 API calls from R for Windows. Is that possible? Thanks. [[alternative HTML version deleted]]

I haven't been able to find an example of using R with interactive = FALSE. How do I start R such that 1. it loads a workspace 2. then starts execution with a function (in that workspace) that I choose 3. exits on completion Thanks. [[alternative HTML version deleted]]

Given studentNumbers<-10; subjEnglish<-sample(-1:100,studentNumbers,replace=TRUE); when subEnglish <=0, 'U'                         <=39, 'F'                         <=49 'D'                         <=59, 'C'                         <=69, 'B'                         <=79,'A'                         <=100 'A+' I

If I create a data.frame using session variables as follows: classResults<-data.frame(subjEnglish,gradeEnglish,subjFrench,gradeFrench,row.names=studentName) How can I remove the variables? I tried > rm(names(classResults)) Error in rm(names(classResults)) :   ... must contain names or character strings Also, how can I include the row.names variable. I tried > names(classResults)

savehistory writes all the executed lines from the session. How can I write everything (executed lines and output) from the active session to a file? Using Edit | Select All then Edit Copy, I can copy everything to the clipboard and write the whole thing to a file manually. If I just used the clipboard, I can paste the whole content into another edittor (for documentation). Is there a way to

Given a table with colnames and rownames, print(mytable) displays the table nicely formatted. How can I capture all of what is displayed as a character matrix? Thanks. [[alternative HTML version deleted]]

ls() gives me the vector of objects in the workspace class(objName) gives me the class of objName class(ls()) just returns character as many times as there are objects. How do I get a vector of all objects in the workspace? [[alternative HTML version deleted]]

I can write a plot to a files of a given format using this: x<-sample(c(1:100),10) bmp("c:/mygraph.bmp") plot(x) dev.off() and then show the image file in another application. This application can also display the image from the stream of numbers that define the image. How I can get the plot as a stream of numbers? [[alternative HTML version deleted]]

be sorted by row in ascending/descending order? Given this matrix:  57 91 31 61 16  84  3 99 85 47  21  6 57 91 31  61 16 84  3 99 I want to end with this:  21  6 57 91 31  57 91 31 61 16  61 16 84  3 99  84  3 99 85 47 The 'order' of the sort is: 3 1 4 2 Also, what R expression will give me the 'order'? Thanks. [[alternative HTML version deleted]]

Thank you Michael, Sarah and Robin for the answers to my original question. Michael you asked:"But this is rarely a good idea....perhaps you could say a little more about your overall goal and we could direct you to a more "R"-ish solution? " I realise eval (known as execute in one of my other languages) is not a good idea. The background to my question is as follows: Using

Hi, When I run this code a part of my x-axis and y-axis changes color. Can somebody tell me what is wrong? Also, is there a way to control the color of the average lines? monthplot(AirPassengers+500, ylim=c(min(AirPassengers), max(AirPassengers+500)), ylab="") par(new=T) monthplot(AirPassengers, col="blue", ylim=c(min(AirPassengers), max(AirPassengers+500)),

I expected the row names to be unique but a data frame appears to be able to hold duplicate row names. This makes me thing that there must be circumstances when it is necessary. However, I cannot think of any. Please enlighten me. [[alternative HTML version deleted]]

Hi, i want to construct a data set similar to "AirPassengers". Its attributes are following. > attributes(AirPassengers) $tsp [1] 1949.000 1960.917 12.000 $class [1] "ts" How Can I construct a data set similar to it having same class and attributes. Thanks -- Amar Kumar Nandan ?:nandan.amar at gmail.com http://aknandan.co.nr

Hi all, I have made an overdispersion test for a data set and get the following result Overdispersion test Obs.Var/Theor.Var Statistic p-value poisson data 16.24267 47444.85 0 after deleting the outliers from the data set I get the following result Overdispersion test Obs.Var/Theor.Var Statistic p-value poisson data 16.27106 0 1 The

I know that [] is used for indexing. I know that [[]] is used for reference to a property of a COM object. I cannot find any explanation of what [[1]] does or, more pertinently, where it should be used. Thank you. [[alternative HTML version deleted]]