search for: collum

Hoi All, I am trying to append collums to a data frame in a for loop. I read in tables, do some processing and then write the result to a data.frame. But, the thing I want is, that the results are appended to the data frame in stead of overwriting the results of the prevous table. It has to look something like this: After going trough...

rails: hi guys, one problem makes me even crazy! I use ruby on rails and mysql, but the table''s collum names in the mysql database is mixed case, not only lower case. but I do have set the database lower_case_tablenames=1, but still, the ruby on rail can not access mysql by just lower case table collums. why?! help! Regards! Su Siyuan siyuan.su@accessmedia.com.cn 2006-04-11

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Apologies for what might seem like an simple question. I have written a model which gives me a frequency distribution for a particular score within a set. What I now want to do is loop this so that I get many different frequency distributions and append them to a table with a collum which specifies which loop the frequency distribution is from. What I wantto end up with would look something like this: Score 1 2 3 4 5 1 5 6 7 4 1 2 2 5 8 1 1 3 3 8 9 2 1 4 etc 5 . Without the loop I can get the model to report the frequency distributions usin...

I''ve been trying to get a couple of web automation tools going today and having a hard time. Seems like everything I try is outdated and won''t run on my environment. Mechanize seemed like a good one but it doesn''t want to run: require ''rubygems'' require ''open-uri'' require ''mechanize'' agent = Mechanize.new

...0 1 1 3 C D A 1 2 3 B A D 2 3,4 Is this possible? Another question: I've got a dataset with about 40 collums and about 20000 rows. Whenever I try to make a contigency table with all my data I get the next error: Error in vector("integer", length) : vector size cannot be NA In addition: Warning messages: 1: In pd * (as.integer(cat) - 1L) : NAs produced by integer overflow 2: In pd * nl : NAs pr...

Had this error when trying to add comments to another user''s photo. ActiveRecord::StatementInvalid in User photosController#show Mysql::Error: Unknown column ''comments.user_id'' in ''on clause'': SELECT photos.`id` AS t0_r0, photos.`user_id` AS t0_r1, photos.`title` AS t0_r2, photos.`body` AS t0_r3, photos.`created_at` AS t0.... I did create a user_id

..., :name => nil%> (...) <% @hotels.each do |hotel|%> <h2> <%= link_to hotel.name, hotel %> </h2> My hotels and facilities are a has_many_and_belongs_to relationship with everything working. The facilities_hotels table is created with the facility_id and hotel_id collums, and the facilities table has for columns a facility_id and description(which is for e.g. pool, 24hroom service etc) The issue is in my model: def self.search(params) if params arel = where(''#searches for names/location/rating'') if params[:fc].present?...

Have any of you used a line like this in your gem file? gem ''therubyracer'', :platforms => :ruby I used it and it isn''t behaving the way the docs said it should. People on SO are giving me workarounds but I''m trying to figure out if the docs are wrong or I''m reading them wrong. More details:

I''m building a new Ruby app with RubyMine. I built a basic app (just a homepage) and it is running fine. Next step is to get the app talking to MongoDb. I''m using this tutorial: http://www.mongodb.org/display/DOCS/Rails+3+-+Getting+Started also tried this one: https://github.com/RailsApps/rails3-mongoid-devise The problem is, after running through the tutorial and starting my