similar to: extracting elements by using logical values

Dear lists, I want to write a function of a vector and reverse the order of its elements. Here is my code: revector<-function(n){ y=vector(length=n) for(i in n:1){ y[i]=i } return(y) } i want my output to be like this: y [1] 10 9 8 7 6 5 4 3 2 1 Any suggestion?? Thanks!! Cheers, Anisah ---------------------------------

Dear lists, I'm in my process of learning of writing a function. I tried to write a simple functions of a matrix and a vector. Here are the codes: mm<-function(m,n){ #matrix function w<-matrix(nrow=m, ncol=n) for(i in 1:m){ for(j in 1:n){ w[i,j]=i+j } } return(w[i,j]) } v<-function(n){ #function of a vector y=vector(length=n)

Dear list, I'm trying to make a loop of a (5x10) matrix and below are my codes. Could anybody help me figure out why my loop is not working. Thanks in advance!! m<-1:5 n<-1:10 for(i in 1:length(m)) { for(j in 1:length(n)) { y[i,j]=sum(i,j) y<-as.matrix(y[i,j]) } } cheers, Anisah --------------------------------- [[alternative HTML version

Dear R User, say I have this sample of data ( attach with). What i'm going to do is to test whether this data is uniformly distributed or not by finding the p-value. I've tried using the punif command but it gave me the value of 1 of all the data. Any suggestion on R command to find the p-value??Thanks in advance!! Cheers, Anisah -------------- next part

Dear lists, Anysuggestion on how to write a loop function which has nx2 matrix as an input, where each of the row represents an interval. the function should return a mx2 matrix containing the no matched interval of x?? i've tried my own function but it's only applies for 2x2 matrix. Here is my code: overlap<-function(x,y){ m=length(x) n=length(y) for(i in 1:m){

hi, I'm in my learning process of doing a programming with "for" loop. How to make a loop of a vector of length 10 where elements are 1,2,3,4,5,6,7,8,9,10. Any suggestion needed!! Many thanks. Cheers, Anisah --------------------------------- [[alternative HTML version deleted]]

hi, I want to plot a dotplot graph but unfortunately R does not have it any more. It suggest to use either the stripchart or the dotchart and i prefer to play around with the stripchart graph. Sadly, the result is not like i want where I'm actually wants the plots/points were scattered around the x-axis. Plus, from the results shows that and the x-axis gave a very large scale, i.e

Hi, I have a matrix data with 21 rows and 6 columns. Below and attach with is my matrix data. My problem is to split the column into 3 subcolumns (except for column 3 and 4) . I want my new matrix data to have 14 columns and 21 rows. Kindly help is highly appreciated. [,1] [,2] [,3] [,4] [,5] [,6]

Dear R, Can anybody help me on how to combine all the elements in a list into a single vector?? I've tried using unlist command but it gave me wrong output. Below is the example of the vector output that i want and attach with is my list of data. Any suggestion?? Many Thanks breakp.start 6978022 10249966 10955201 11045352 11814604 13847633

hi!! Below I have 4 columns vector of c and d which are unequal in length.These c and d have 2 columns each where these 2 columns represent an interval values. How am I going to get an overlapping over these interval values?? Please help me sort this problem!! Thanks in advance.. c d 17130612 17587118 17712302 18100404 17712302

Dear R-users, Attach with is my data..what i want to do is finding a suitable distribution for my data..I want to run a few test like the poisson and the exponential distribution. Please help me on how to find the p-value for poisson as well as the exponential distribution without knowing the parameter. Is it possible?? Thanks in advance. love, Anisah -------------- next

Dear lists, any suggestion on how to write a function to return a TRUE if interval [a,b] overlaps the interval [c,d]. I've tried it but an error occur saying that 'could not find function v ; in addition warning message occur'. Below is my codes.Please help me sort this problem as i'm in process of learning of writing a function. Many thanks overlap<-function(m,n){

Dear all, i have 2 lists of data with each of the list contain 14 columns. How am i going to extract column 12 and 13 from each of the list ?? and can i combine my extracted columns to form a single list. Attach with are my data. Your coorperation is highly appreciated. Many thanks Regards, Anisah -------------- next part -------------- An embedded and charset-unspecified

I have two sets of interval data.Below are my two dataset. In these dataset, there is a missing values in each of the data. I want to find the non-overlapping interval values. Here is my code: mysetdiff=function(x,y){ m=length(x) n=length(y) bx = logical(m) by = logical(n) for(i in 1:m){ for(j in 1:n){ if(x[i]<=y[j]){ bx[i] = T by[j] = T }

Dear lists, i want to find the non-overlapping interval values with this code: mysetdiff=function(x,y){ m=length(x) n=length(y) bx = logical(m) by = logical(n) for(i in 1:m){ for(j in 1:n){ if(x[i]<=y[j+1]){ bx[i] = T by[j] = T NA = NA } } } sx = x[!bx] sy = y[!by] s=c(sx,sy) return(s) } Below is my

hello!! say that i have the values of x1 and x2. my x1 has longer length than x2. how am i going to remove the similar values of x1 and x2. Any suggestion?? Thanks in advance!! Cheers, Anisah e f [1,] 17358865 17906353 [2,] 17966995 21295547 [3,] 21306539 27880531 [4,] 27880531 34118702 [5,] 34166504 35395488 [6,] 36111044 36132622 [7,]

Hi, I have sucessfully plotted the graph by using the following command: ec<-rep(0,length(e)) fc<-rep(0,length(f)) plot(e,ec,type="p",col=1,pch=19) points(f,fc,col=2,pch=20) legend(1.0e+08,1.0,c("dog", "human"),text.col="green4",pch=c(19,20),col=c(1,2)) Below are the values for e and f...the questions is how am i going to adjust

Dear all, I have a data which is in text file and i would like to import the data to R. From the manual, i?ve found the read.table command function is the most appropriate but when i wrote the command an error had occur. It say ?Error in read.table"C:/Users/user/Documents/cfa-1.txt", header = T, sep = "\t",skip=10) :more columns than column names?. Please help me with this as

Dear All, Help is needed! I have a matrix with frequencies of fish larvae per length class (var. sl) and age-group (var. median.no) obtained with >k<-table(cut(sl,(5:22)),median.no) >k[2:5,1:5] #to ilustrate k 4 5 6 7 (6,7] 3 1 0 0 (7,8] 3 0 1 0 (8,9] 3 4 3 5 (9,10] 3 15 7 13 from this matrix I would like to obtain the mean age per length class i.e.

Full_Name: Fernando Henrique Ferraz Pereira da Rosa Version: 1.8.0 OS: Linux 2.4.21 Submission from: (NULL) (200.206.211.169) After installing R 1.8.0, the R DBI interface stopped working. I tracked it down as a problem in the 'methods' package, that comes in the default installation. Somehow the function '.valueClassTest' which is defined on package 'methods',