similar to: how to do a IF ELSE in a matrix format

Say I have: > set.seed( 1 ) > m <- matrix( runif(5^2), nrow=5, dimnames = list( c("A","B","C","D","E"), > c("O","P","Q","R","S") ) ) > m O P Q R S A 0.2655087 0.89838968 0.2059746 0.4976992 0.9347052 B 0.3721239 0.94467527 0.1765568

Could someone please suggest a method to store the current random seed. I'm having trouble understanding how to correctly use set.seed and .Random.seed. Specifically, I have the following code that crashes: set.seed(seed) for(i in 1:10){ print( runif(1)) } To get around this I need to split the number of iterations into chunks: set.seed(seed) for(i in 1:5){ print(runif(1))

Dear R-users, I state that this is for beginners, so you may ignore this in order not to be irritated. By the way, "patience" is another important thing, together with "kindness", we should keep in mind when we teach students and our own children as Jim Lemon pointed out well in the context of the Socratic method. You may know that being kind does not mean giving

Hi, I try to apply a function to subsets of a data.frame. tapply() does the job, but the as output, I am looking for a vector (not an array/matrix) ordered in the same way as the original data, so I can simply cbind the result to the original data.frame. Below is a minimal example. I know that there are packages that can do these things easier, but I'm looking for a fast solution not

Hi all, Given a data frame: my.df <- data.frame(a = c(1:5, 1:10, 1:20), b = runif(35)) I want to split it by "a" such that I end up with a list containing 3 components i.e. the first containing a = 1 to 5, the second a = 1 to 10 etc. In other words, sets of sequences of a. I can't seem to find the right form using the split function - can you help? Much appreciated. David

Dear R-users, #### below is my code to randomized x three times. > x=c(6,8,9,11) > plan=NULL > for(i in 1:3){ + set.seed(i) + r<-runif(x) + plan=cbind(plan,r) + } ##### which gave the matrix > plan r r r [1,] 0.2655087 0.1848823 0.1680415 [2,] 0.3721239 0.7023740 0.8075164 [3,] 0.5728534 0.5733263 0.3849424 [4,]

hey, Rers in Stata therer is a loop command ` ' which could do the following: forvalue i=1/10 { ?gen?x`i'=expression } this will generate variable: x1,x2,,,,,x10. so, does R have a corresponding one to this? And one more very basic question: after I open a file and modify it, such as generate some new variables and change some old ones, how to use the changed dataset in

Hi, I am new in R and stumbled on a problem my (more experienced) friends can not help with with. Why isnt this code working? The function is working, also with the loop and the graph appears, only when I build another loop around it (for different values of p) , R stays in a loop? Can't it take more then 2 loops in one program? powerb<-function(x,sp2,a,b,b1,m) {

Hello Rers: Let's say I have a column that looks like this: Column 167.8 292.8 363.3 1.9 115.25 I want to manipulate the above data such that I only end up with this same column but only with its decimals and not its whole numbers. So the new column would look like this (but the real column is VERY long): Column .8 .8 .3 .9 .25 Any suggestions about how I could do this? -- Do all you

Hi I want to set a variable to either 1 or 0 depending on an value of a dataframe and then add this as a colum to the dataframe. This could be done with a loop but as we are able to do questions on a complete row or colum without a loop it would be sweet if it could be done. for example: table: Name Age Joel 24 agust 17 maja 40 and so on... And what I want to do is a command that

Hello, I must be doing something wrong that's very obvious. But I just don't see it. I changed my Windows Time Zone to GMT and my Financial Center to Montreal. But I still get several warnings. >Sys.timezone() [1] "GMT Daylight Time" >myFinCenter [1] "Montreal" >Sys.timeDate() [1] "Montreal" [1] [2005-04-19 10:55:02] Warning messages: 1: Set

More information on the problem. A couple of days ago I posted a request for help for this error msg terre{testgb}73: smbpasswd Old SMB password: New SMB password: Retype new SMB password: /opt/samba/bin/smbpasswd: machine 127.0.0.1 rejected the session setup. Error was : ERRSRV - ERRbadpw (Bad password - name/password pair in a Tree Connect or Session Setup are invalid.). This happens only

Hi all, Is there an IAX2 termination provider in Montreal that could offer unlimited local and possibly long distance calling? Would also like to get a DID in Montreal if all possible. Asterisk is so amazing! Thanks to Mark and others, great work! Thanks Stephane -------------- next part -------------- An HTML attachment was scrubbed... URL:

Rers: I have some ecological data (stream velocity vs. % cover of submerged weeds) that shows strong evidence of a thresholding step-function, e.g. below some velocity, % cover ranges from 0% to 100% (with no apparent relationship to velocity within this range of velocities), but above a certain "threshold" velocity, the % cover does not appear to exceed, say, 10%. There are good

[Using 2.0.1 under Windows XP] There are a few pages on the internet that list equivalents of "thank you" in many languages. I downloaded one from a Google search and I thought that it would be interesting and a good R exercise to sort the file into the order of the expressions, rather than the languages. I tidied up the web page and got it into the format that it was nearly in:

Fellow Rers, Please forgive me if I have posted this to the wrong R list serve. Over the course of the years that I have used R and participated in this list server, I have noted a large number of questions and answers that direct people to specific packages. The multitude of packages is one of the great strengths of R. Unfortunately there is no (or at least I am not aware of) any single source

Hey, R Users my windows is 64 bit windows 7.?I am trying to install the package ucminf into my 64 bit version R but cannot.??the package I downloaded is from http://cran.r-project.org/web/packages/ucminf/index.html?and I installed it with the "install from local zip files", due to I did not connect my computer to internet. did anyone meet this problem and is there a version of

I get these messages when compiling on a Sun Sparc 5 running Solaris 2.6: Compiling ipc.c ipc.c: In fonction `api_RNetServerEnum': ipc.c:1194: warning: passing arg 4 of `qsort' from incompatible pointer type Compiling nmbd_incomingrequests.c nmbd_incomingrequests.c: In function `process_node_status_request': nmbd_incomingrequests.c:380: warning: passing arg 4 of `qsort' from

Attempting to log in through Squirrelmail. Jan 19 09:34:07 montreal dovecot: imap-login: Login: user=<steve>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured Jan 19 09:34:07 montreal dovecot: IMAP(steve): initgroups(steve, 15) failed: Invalid argument This entry appears nowhere else in the log. montreal# id steve uid=268(steve) gid=15(users) groups=15(users), 626(moodleCreators),

Hi dear Rers, I am using SSOAP package to access SOAP service at NCBI. I followed the example code in SSOAP but failed. > z <- .SOAP("http://www.ncbi.nlm.nih.gov/entrez/eutils/soap/soap_adapter.cgi", method="run_eInfo", db="pubmed", action = I("einfo")) Error: protect(): protection stack overflow what's wrong? Thanks very much. Regards