similar to: Stuck ...can't get sapply and xmlTreeParse working

Having a hard time understanding the help files for tryCatch. Looking for a little help with the following statement which sits inside a for loop zest[i] <- tryCatch(sapply(getNodeSet(zdoc, "//zestimate/amount"), xmlValue), error=function() zest[i] <-"NA") zest is a numeric vector If the sapply statement evaluates to an error, I'd like to set the value of zest[i]

I am trying to read some data off the zillow site. Newbie to xml, html, parsing and the xml package. I've been able to load the web page I'm interested with the following code but I'm not sure of the next step to get the information I'm interested in into R : library(XML) url <- "http://www.zillow.com/homes/511 W Lafayette St, Norristown, PA_rb" doc <-doc <-

Statement 9 using sapply does not seem to give the correct answer (or at least to me). Yet I do what I think is the same thing with statement 11 and I get the answer I'm looking for. 9 : s <-sapply(unlist(v[c(1:length(v))]), max) 11: for(i in 1 :length(v)) v1[i] <- max(unlist(v[i])) Shouldn't I get the same answer ? library(XML) rm(list=ls()) url <-

so I am trying to sum month over month the amount that a user has posted. So for example: User 1: Jan $3000 Feb $4000 March $1500, etc. I can get this to work if I sum totals (aggregate of all users) but just not by user. Here is my code in the controller: def index @users = User.find :all, :order => ''name ASC'' @deal_groups = Deal.find(:all).group_by {|t|

I used screen scraping to extract some information and put it into a table called tbl. Now I want to modify the table a bit so the data can be more useful. Here's the code I used: library(XML) rm(list=ls()) url <- "http://webapp.montcopa.org/sherreal/salelist.asp?saledate=05/25/2011" tbl <-data.frame(readHTMLTable(url))[2:405, c(3,5,6,8,9)] names(tbl) <-

Dear forum: I've been trying like for hours but I cannot solve this. I wonder if you could give me a hand. I would like to combine the following elements of an array which I must generate in order to get the syntax I need for another software, lets say: c<-c(1:7) zest<-c(12,34,45,132,56,23,6) p<-"[foresnat2]" for(i in 1:7){tre[i]<-paste("con(",p," ==

Have in a module in ./lib: module Pricing def sell_price (cost.to_f)/((100-(margn.to_f))/100) end def sell_price_inc ((product.cost.to_f)/((100-(product.margn.to_f))/100)*1.14) end def charge_excl (sell_price).to_f * quantity end end A model product: class Product < ActiveRecord::Base include Pricing attr_accessible :name, :code, :cost, :company_id, :margn

Question for all: Right now i have a Table in a mySQL DB that has a row called Ingredients. When the data is entered into the DB its enter like so from a text area: 1 1/2 lbs. beef top sirloin, thinly sliced 1/3 cup white sugar 1/3 cup rice wine vinegar 2 tablespoons frozen OJ concentrate 1 teaspoon salt 1 tablespoon soy sauce 1 cup long grain rice 2 cups water 1/4 cup cornstarch 2 teaspoons

Hello! I am not experienced enough to know whether I have found a bug or whether I am just ignorant. I have been trying to use the tm package to read in material from RSS 2.0 feeds, which has required grappling with writing a reader for that flavour of XML. I get an error - "Error : 1: EntityRef: expecting ';' - which I think I've tracked down. The feed being processed is from

Hello, don't know if this behavior is a bug, but I want to share this information. samba server version 3.4.3 is installed on solaris10 x86 compiled with gcc Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.10/3.4.3/specs Configured with: /builds/sfw10-gate/usr/src/cmd/gcc/gcc-3.4.3/configure --prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as --with-ld=/usr/ccs/bin/ld

In the sample program below I have a form of 6 text fields, in a scrolling window, followed by a row of function buttons. Problems: 1) For data entry purposes I''d like the function buttons NOT to be entered by pressing Tab keys, and retain their ''clickability'', but when the user Tab''s out of the last scrolling field (postcode) to have the form scroll to the

Hi There, we have a problem with a fresh installation of gluster 3.11 on a ubuntu 16.04 server. we have made the installaton straight forward like it ist described on the gluster.org website. <http://gluster.readthedocs.io/en/latest/Install-Guide/Configure/> in fstab is: /dev/sdb1 /gluster xfs defaults 0 0 knoten5:/gv0 /glusterfs glusterfs defaults,_netdev,acl,selinux 0 0 after