similar to: Help understanding behavior of apply vs sapply

Hi ?atan2 says that atan2(y,x)=atan(y/x) for x and y numeric or complex vectors. Well, I would expect atan2(1,1i) to be equal to atan(-1i), but > atan2(1,1i) Error in atan2(y, x) : Non-numeric argument to mathematical function > R.version _ platform powerpc-apple-darwin8.5.0 arch powerpc os darwin8.5.0 system powerpc, darwin8.5.0

Hi ?atan2 says that atan2(y,x)=atan(y/x) for x and y numeric or complex vectors. Well, I would expect atan2(1,1i) to be equal to atan(-1i), but > atan2(1,1i) Error in atan2(y, x) : Non-numeric argument to mathematical function > R.version _ platform powerpc-apple-darwin8.5.0 arch powerpc os darwin8.5.0 system powerpc, darwin8.5.0

Sort of new at all this... I installed Ruby on Rails on my Mac according to the instructions on HiveLogic''s blog. I can run the server and even create my database schema automatically. But when I try to open up my results, I end up getting a 500 Internal Server error on my browser. My Unix terminal reads the following: dyld: NSLinkModule() error dyld: Symbol not found:

Hi, I'm experiencing R segmentation faults on multiple versions of R when writing out a particular data.frame: ## dd is a 44 by 3 data.frame load(url("http://stat.bell-labs.com/RS-DBI/download/dd.rda")) write.table(dd, file = "dd.csv", sep = ",", row.names = FALSE) this occurs on > sessionInfo() R version 2.2.0, 2005-10-06, i686-pc-linux-gnu

Hi all, I''ve been trying to install GraphicsMagick with RMagic. I''ve tried ImageMagick with RMagic as well. I''ve tried the installations using Darwin Ports, Gems and from source. Nothing seems to work properly. My specs: ruby --version ruby 1.8.4 (2005-12-24) [powerpc-darwin8.5.0] rails --version Rails 1.1.0 convert -version Version: ImageMagick 6.1.8 04/05/06 Q16

Hi. Is there any reasonable possibility to check a mounted fs for errors? It would be useful to have server-filesystems (and harddisks) checked periodically on machines that are only rebooted by hardware-failures ;-) Regards, Christian -- * Christian A. Lademann, ZLS Software GmbH mailto:lademann@zls.de * ZLS Software GmbH * Frankfurter Strasse 59 Postfach 1628

Christian Lademann wrote: Hi. Is there any reasonable possibility to check a mounted fs for errors? It would be useful to have server-filesystems (and harddisks) checked periodically on machines that are only rebooted by hardware-failures ;-) Regards, Christian -- * Christian A. Lademann, ZLS Software GmbH mailto:lademann@zls.de * ZLS Software GmbH * Frankfurter Strasse 59

Hi. What is the state of ext2resize for Ext3? How about the online-ext3-patch? Regards, Christian -- * Christian A. Lademann, ZLS Software GmbH mailto:lademann@zls.de * ZLS Software GmbH * Frankfurter Strasse 59 Postfach 1628 mailto:zls@zls.de * D-65779 Kelkheim D-65766 Kelkheim http://www.zls.de * Telefon +49-6195-9902-0 Telefax

This is wierd. I''m trying to get Ruby/LDAP up and working, and at least the basics work fine under irb: irb(main):001:0> require ''ldap'' => true irb(main):002:0> LDAP::Conn.new() => #<LDAP::Conn:0x1b87ac> irb(main):003:0> So far, so good. All LDAP::Conn.new does is call ldap_init with host and port parameters, which in turn just allocates the

I seem to have two versions of Ruby on my PowerBook. I have been learning RoR and walked through the online scripted install of Ruby and Rails several weeks ago before I really understood what was going on. If I open Terminal and type: ruby -v I get back: ruby 1.8.4 (2005-12-24) [powerpc-darwin8.5.0] So that looks fine, but I don''t know where my Ruby interpreter is located. I

Hi all, I''ve got a very obscure problem. We''re trying to get Rails to talk to Filemaker. So we''ve setup an ODBC dsn and via RubyODBC we''re talking to it. Excellent. Try it under rails and rails won''t even startup, getting bus errors anytime we require ''odbc''. Environment OSX Tiger 10.4.6 Rails 1.1.2 Ruby 1.8.4 RubyODBC 0.998 via

** ** I posted this message quite a time ago. Some people use my patch and I ** receive queries for a recent version from time to time. This patch didn't ** make it into the mainstream distribution yet. Sorry. ** ** This is the updated version for Samba-1.9.17p1. ** Hello, people. I have implemented some enhancements for Samba: 1. dynamic configuration-values 2. configurable

Hello All, I know there is a component for integrating LDAP with Rails but is anyone doing any Windows Active Directory Authentication to a Rails app? I am rebuilding a site that was constructed out of asp and I would like to rebuild/improve it via rails. On the requirements side I will need to communicate with Active Directory and I will be required to use MSSQL for the database. Can anyone

I moved a project from /var/www/mypro to /home/user1/mypro ... what do I have to change in config? The server does not start anymore. Thank you - Eric -- Posted via http://www.ruby-forum.com/.

Hi, sapply((1:NCOL(hermes)),function(x) hist(hermes[,x],main=names(hermes)[x])) .......this works , but i would like use it with apply to generate many plots in one step! #################################################################### >>apply((1:ncol(hermes)),2,function(x) hist(hermes[,x],main=names(hermes)[x])) Error in apply(1:ncol(hermes), 2, function(x) hist(hermes[, x], main =

Hello: I would like to sum every x columns of a dataframe for each row. For instance, if x is 10, then for dataframe df, this function will sum the first ten elements together and then the next ten: sapply(list(colnames(df)[1:10], colnames(df)[11:20]),function(x)apply( df[,x], 1, sum)) If the number of columns is quite large (1000's), then manually entering the list above is not practical.

Hi r-users, I have this code here : dt   <- winter_pos_sum bt   <- c(24.96874, 19.67861, 23.51001, 19.86868); round(bt,2) alp  <- c(2.724234, 3.914649, 3.229146, 3.120719); round(alp,2) bt_min  <- min(bt) ; bt_min p       <- alp_sum    ; p t  <- 50 t1 <- t+1             #first get the sum over the eigenvalues for a particular power i gam_sum <-

I have been trying to learn the various "apply" functions but am still learning their appropriate use. I appreciate any help the R community can offer me. Sorry for the length of this post. Background: I have data on my hard drive organized in the following manner: The data pertains to many different "samples" of data. (e.g. sample 001, sample, 002, sample 003, etc.) Each

Dear list, I am trying to plot histogram of a 10 by 5 matrix by columns. What is a good way to paste the column names? dput(a) structure(c(0.891856482875103, 0.249593821948295, 0.0385066520473322, 0.109098868876336, 0.238035894186719, 0.971470380855763, 0.168018536530906, 0.941457062296419, -0.285381460315397, -0.0229335863796271, -20138.175683257, 28190.7238887329, 8521.44473371867,

Dear all, Last December there was a thread regarding the famous FAQ 7.21 "How can I turn a string into a variable?" and asking what people want to do with these strings. My, certainly trivial application would be as follows: Assume I have a data.frame containing besides others also the columns f1, f2, ..., fn and I want to create a command like: apply(sapply(list(f1,f2,f3),is.na),2,sum)