search for: acolumn

I keep finding myself in a situation where I want to calculate a variable name and then use it on the left hand side of an assignment. For example iteration <- 1 varName <- paste("run",iteration,sep="") myList$parse(text=varName) <- aColumn I want to take some existing variable "aColumn" and use the name "varName" name for it and put it into a list "myList". That use fails with this error: Error: couldn't find function "(<-" I've tried many variations on the theme. If I could...

Hi, my doubt is very simple. I'm sure I've seen someone using something like this before, but unfortunatelly my searches in the archives were useless. Well, I have some objects called after a name that has a number attached to it, varying. Let's say I have: > ls poly1 poly2 poly3 poly4 poly5 poly6 ... I would like to access these objects using a for(), in which I could do

Hi, I tried many things to insert a data in an Oracle Table, but the Rails compiler never Works! I create this Oracle table: CREATE TABLE "FOO" ( "id" int NOT NULL primary key, "acolumn" VARCHAR(10) NULL ) and when i tried to insert a new row the Rails compiler tell me : OCIError: ORA-00904: invalid column name: INSERT INTO AGO.FOO (acolumn, id) VALUES(''pippolo'', :id) While with MySQL I''ve no problem using the same table!. I tell to Oracle als...

dear R experts--- t <- 1:30 f <- function(t) { cat("f for", t, "\n"); return(2*t) } g <- function(t) { cat("g for", t, "\n"); return(3*t) } s <- ifelse( t%%2==0, g(t), f(t)) shows that the ifelse function actually evaluates both f() and g() for all values first, and presumably then just picks left or right results based on t%%2.

To make a new istance of an Oracle table with Rails, i need that this table had a column named ''id''. This ''id'' must be Primary Key & auto_increment;. How Can I modify the ''id'' properties to do it Auto_increment in Oracle? -- Posted via http://www.ruby-forum.com/.