similar to: A sample question

I have an adjacency matrix and I want to obtain a matrix of the minimum paths between the nodes. Thank you Alessandro Ambrosini -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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 !)

The first: if I have a vector as (1,1,3,2,1,1), which is the command that gives all the positions of the min value? From the vector of the example a would like to obtain a new vector as (1,2,5,6) that give me all the positions of the minimum value 1. The second: if I have a matrix "A" and I want to obtain a new matrix deleting a column or a row of A, what have I to do? Thank you.

-----Messaggio originale----- Da: Ambrosini Alessandro [mailto:klavan at tiscalinet.it] Inviato: luned? 29 aprile 2002 20.38 A: R-help at lists.R-project.org Oggetto: Problem Hello! This is the situation. I have a file in wich there is a scattered matrix. I give an example: aa bb cc bb xx dd cv st rw xx yu de qw ww zzp where aa is a node that has a path with aa, one with bb, and one with cc.

Hello! Two questions: 1: I have to import a matrix of adjacency from a file of a software that is not R (for example "bloc notes" of Windows). The problem is that the matrix is not in the explicit form as 0 1 1 1 0 0 1 0 0 but it is a scattered matrix where in each row there are two nodes that have a direct path. The matrix is a b a c b a c a For example, the first row

I have a scattered matrix that I have to import from an external file. In this case all the lines could have a different size. The graph is oriented. I give you an example: a b c b a c d c b The first row expresses that "a" has a direct path with "b" and also with "c". In the second "b" has a path with "a" and one with "c". In the third

Hello I have the matrix a<-matrix(c(2,1,0,1,2,2,1,5,7,2,5,12),nrow=6) a [,1] [,2] [1,] 2 1 [2,] 1 5 [3,] 0 7 [4,] 1 2 [5,] 2 5 [6,] 2 12 Suppose that in the first row we have 3 men of England, 2 with hair, and 1 no In the second we have 6 italian men, 1 with hair and 5 no ... I want to find if there is a dependence between men withouth hair and

Another question about lattice: Is there a way to use plotmath in the labels and strips? E.g. xyplot(y~x|group,data=test.df, panel=function(x,y,subscripts,df) { llines(x,y,col="black",lwd=2) llines(x,df[subscripts,"lowerCI"],lty=2,col="#aaaaaa") llines(x,df[subscripts,"upperCI"],lty=2,col="#aaaaaa") },

Hello. I don't know if you can help me but I try. I have a collection of objects, we suppose that they are 1000. After some works that I made I divided this collection in some clusters. Suppose to have obtained 50 clusters. For each cluster I found a particular value called Precision, where 0<Precision<1. Taken the firs cluster I want to compare his Precision with the precision of his

Hello. I want to use "for". I have a matrix called "mat" that has got 100 rows. I want to take the line 1 and make a1<-which(mat[1,]==1) After this I want to take the second row and make a2<-which(mat[2,]==1) and so on until I arrive at row 100. I want to make it automatic for the 100 rows and so I wrote: for(i in 1:nrow(mat)){ ai<-which(mat[i,]==1) }

I'm new to lattice and can't figure out what the problem is with the following example: ######################### > library(lattice) Loading required package: grid Attaching package `lattice': The following object(s) are masked _by_ .GlobalEnv : xyplot The following object(s) are masked from package:base : levels > test.data <- data.frame(x=rnorm(100), +

Hi, I've tried to install package "tseries" on my computer (on Windows) but it doesn't work so far. I have Perl but no compilers (C or Fortran) installed. So could anyone who happens to have them please mail me the binaries? Many thanks in advance, Sonchawan _________________________________________________________________

Hello! If I have a matrix as 1 2 2 3 and I want to change the value 2 in 0, what can I do? Thank you -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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 !)

I have gone over the examples and can't figure this out: rho<-.77 text(x=.05,y=.5,paste(expression(rho),rho)) I was hoping to get this to print a Greek rho with 0.77 beside it. Instead I get: rho 0.77 (i.e. Roman lettering) The help on expression() is quite opaque so I don't understand how it works. Thanks for any help. Bill Simpson

Hi, Suppose I have a function: myfunc <- function(x, y) { ... } And within the function I want to print out the name of the x, y vectors. For example, if I do: > myfunc(foo, goo) [1] "foo" "goo" It shall return "foo", "goo" (with or without quotes is fine), where foo and goo are two vectors with numbers. I know this sounds strange, but I'd

Hello, I would like to know how to delete some rows? Suppose I have a large data frame look something like this: x1 x2 x3 .............. a 1 0.45 b 1 0.41 c 0 0.43 a 1 0.39 d 1 0.40 e 0 0.41 r 1 0.42 a 0 0.46 . . .. I would like to have another data frame which has all

Derar R-people I have troubles understanding what the function sort.list() is doing. On the homepage it says that it returns a permutation which rearranges a vector into ascending or descending order (like order() but on a vector instead of a sequence). > sort.list(c(0, 2, 10, 11, 4)) [1] 1 2 5 3 4 which does not make sense to me. In fact I am getting the same (non-sensical) result using

A student of mine wants to use R to do some nonmetric multidimensional scaling. According to the R FAQ, there's a package called pcurve that computes multidimensional scaling solutions, but I was not able to locate it the contrib page (I am a Windows user with R version 1.4.1). Can anyone tell me whether it is possible to do nonmetric multidimensional scaling with R, and if so, how? John

Hi there, Given 2 lists of integer vectors, i.e.: > lista1 $"1" [1] 1 34 5 $"2" [1] 2 1 $"3" [1] 3 10 15 > lista2 $"1" [1] 1 5 $"2" [1] 2 1 $"3" [1] 3 10 29 I want to obtain the union of both, defined as the union of the vectors, that is lista.union[[1]] <- union(lista1[[1]],lista2[[1]]): > lista.union

Hello. Given two scattered matrix a b c d s n q w e r t y and cx vf re ty sw k sa gf jk we as cd I want to obtain a single matrix as a b c d s n q w e r t y cx vf re ty sw k sa gf jk we as cd What have I to do? Thank you Alessandro -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html

Hi guys, I have recently installed a Asterisk Server with CDR Call Detail Records. I have installed it over a Asterisk 1.2 , but now It do not run . I have installed it with the following procedure: # yum install ncurses #yum install openh323-devel # yum install mysql-server # yum install mysql # yum install php-gd # yum install php-mysql # yum install mysqlclient10 # yum install zlib # yum