similar to: Left Joins with Rails?

So I''m new to all this Rails stuff and this is probably a database design-related question to, but here it is... Just for learning I''m trying to build a little real estate listings application. Of course there is the listings model which will store basic information like name, price, description, and all that jazz. I''m to the point where I want to figure out how to

Hello list I am trying to use a Googlemaps tile (png file, 640 X 640 px tile) as a background to a plot and have been using the rgdal library to read in the PNG file (modified from code in the RGoogleMaps package). This works OK. My problem is is that the SGDF2PCT function in rgdal seems to be limited to 256 colors and this is introducing (I think) some degradation to the image which appears on

been doing some searches on how to get googlemaps working in a ror app. seems like cartographer is the main one? is this true? Thanks -- Posted via http://www.ruby-forum.com/.

Hi, I''m using mapstraction with Google Maps api and I want to use routes. As of now, mapstraction only supports mapquest API to do this, so can I use the underlying googlemaps API to do this, while using mapstraction? If yes, how? Btw, mapquest route demo doesn''t work (Error: MQA is not defined / Source File: http://mapstraction.com/mapstraction-js/mapstraction.js / Line: 621)

Thanks in advance. I want to derive correlations of variables in a dataset Specifically library(Ecdat) data(Housing) attach(Housing) cor(lotsize, bathrooms) this code results only the correlationship between two variables. But I want to examine all the combinations of variables in this dataset. And I will finally make a table in Latex. How can I test correlations for all combinations of

Hola Estoy ahora mismo en el MADData <http://www.maddata.es/>, y en proceso de hacer un Shiny, quiero meterle un mapa con los puntos de medida del tráfico y el tráfico. Pero como novato quería ver si me recomendais alguna librería para hacer mapas y embeberlos en shiny, ya sea googlemaps, leaflet, cartodb... y cualquier enlace a buena documentación es muy bien recibido! :-) Miguel

In my layout header I inserted the standard helper : GMap.header I built the map in my controller , I build either a standard table or a map and display it in the corresponding partial the map is built without any problem with the icons and markers ( @map is correct...) @map = GMap.new("map_div") ... @map.icon_global_init(GIcon.new(:image =>

First post/newbie post... bear with me. What I''m trying to achive (music site): A system containing tracks and moods with a HABTM relationship. I''ve got all that set up and functioning in the admin environment - i.e. admins can apply a variety of moods to a particular track via a series of checkboxes. Join table works just fine. I''m currently stuck on allowing

Hey was wondering how to setup a select box that when I call Model.new(params[:model]) it will automatically putit into the db... I tried <select name="home_bedrooms" id="home_bedrooms"> <option value="0">0</option> ... </select> then when I do @home = Home.new(params[:home]) that field doesnt insert into the db.. any ideas? -Ray

hi, what code in R would I use to solve the problem below? An apartment complex has 250 apartments to rent.If they rent x apartments then their monthly profit is given by: p(x)= -8^x^2 + 3200x -80000 Thanks. [[alternative HTML version deleted]]

Muchas gracias Carlos, que rápidez!!, a ver que consigo, ya os pasaré el link! El 27 de septiembre de 2014, 19:18, Carlos Ortega <cof en qualityexcellence.es> escribió: > Hola Miguel, > > Aquí tienes algunos ejemplos: > > > http://freigeist.devmag.net/r/819-fracking-in-your-neighborhood-shale-oil-and-gas-economic-impact-map.html > > >

Using write.table i would like to save data as an excel file to a folder. I am not too sure how to write the file path or what to name the file. I would appreciate any feedback. > write.table(x, file = "", append = FALSE, quote = TRUE, sep = " ", + eol = "\n", na = "NA", dec = ".", row.names = TRUE, + col.names =

Morning All, I have a boolean value called: countyid with the i.d. of XL Is it possible to give a unique entry two values so if I search for XL1 or XL2 this unique entry is shown in both queries? Cheers John

Hola: Estoy intentando generar un mapa de calor que muestre, dadas unas coordenadas geográficas determinadas, el ?calor? (cuanto mas alto el valor de esta variable mas rojo y cuanto mas bajo mas azul) de una determinada variable. Es decir con unos datos como estos: x y z -3,716575 40,41743 3.169 -3,710735

Census from 1990 california in USA. It?s a data frame with data from 20640 zones from Calif?rnia. Zones are chosen as being geograficly near, wich one with 1500 persons (mean). For each zone are provided several informations in the colums from data frame: - longitude e latitude from the geografic centre - median age of houses in the zone (housingMedianAge) - total number of houses in the na zone

Hello, I'm looking for a UPS that the beeper can be silenced with nut via ups.beeper.status variable for a HTPC close to bedrooms. I have googled extensively and there is not a lot of information about which UPS's actually support this feature. There are few references to UPS's that apparently list ups.beeper.status as being available, but without actually being

A few years ago, one of our interns was curious about system time keeping features in computer systems.? This intern was also the proud owner of an inexpensive Radio-Controlled Clock. The intern wondered why computer motherboards were not just equipped with a chip like the ones in the RCC so that their system time would always be correct. I posted a question about this on the CentOS email list

Hi, I'm using SolusVM control panel to create KVM VPS. Suddenly, I can't make any template on Host-Node. Their build log says the SolusVM can't read the libguestfs in server. Please check here. /scripts/kvmtemplate --mode=prescan --vmid=kvm124 --generation=2 "libguestfs: error: guestfs_launch failed. See http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs and/or run

I have a script that I am using to populate a database from a CSV file: RAILS_ENV = ''development'' require File.dirname(__FILE__) + ''/../../config/environment'' require ''csv'' # Destroy existing data Residence.destroy_all # IMPORT DATA FROM apartments.csv db_file = "#{RAILS_ROOT}/db/apartments.csv" CSV.open(db_file, "r",

I have a problem with the :include option in find for my has_one :through association. I have Users, Profiles and Customers, all connected to each other with a has_one :through => :membership association like this: class Profile < ActiveRecord::Base #could also be user or customer has_one :membership # i saw an acrticle of Ryan about has_one :through, there this would be has_many, is