similar to: Updating Table without ID Column

Hi all, i am looking from some insights to define own R functions. so far i found most basics in documentations that are around on the web. except for one thing: I?d like to define some function, say: #assume my data matrix contains vectors like data$myColumn1,data $myColumn2 etc. getMyColumn <- function (columnid){ x<-data$MyColumn?columnid?[data$indexone=1 & data$index2=5]

Problem: I keep getting: "Error in (index - 9):index : argument of length 0" when I run this code in an automated loop, but when I step through it by hand, I have no problems. It keep crashing when i<-10. I cannot figure this out to save my life! Please help and THANK YOU in advance! variables: FM100 is a matrix of columns: year, day (all years set to 366 days), region 1, region

Hello all, Is there a method for updating all the attributes from a hash without saving to the database? (the counterpart of update_attributes but without saving). What I want to do is: person = Person.find(params[:id]) person.update_without_saving(params[:person]) #update the in-memory object. # Process person object ....... person.save I know that when you are creating a new object, you can

Getting this error when hitting update. NoMethodError in Article#update You have a nil object when you didn''t expect it! You might have expected an instance of ActiveRecord::Base. The error occured while evaluating nil.update_attributes Source code. def create @article = Article.new(params[:article]) @article.user = @session[''user''] if @article.save

Im having trouble with a sports site im creating for a client of mine. The part is where the Team Captians for each team in the league go into the admin section to submit a match report for each match. The form looks like this: TEAM 1 BATTING: (these are all drop down menus that pull the player names from the database) There are 10 of these rows that look like this, 1 row for each player.

Hey all, I''m working on a site for a client that has a scedule im trying to display that pulls the next events for the upcoming Sunday from a MySQL table....The table stores the event date as mm/dd/yyyy. I''ve tried to think of everyway possible to get this thing to change after every sunday to show the next sunday''s events, but I end up doing it manually... Is it