similar to: What am I doing wrong with sapply ?

Can't seem to get the code below working. It gets stuck on line 24 inside the function hm; comments show the line in question. The function hm is called by sapply and is at the bottom of the code. Other stuff above line 24 works correctly including the first couple of lines of the function hm. Should I be using a different apply function or am I doing something wrong with xmlTreeParse ?

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) <-

Hi, beginner to R and was having some problems scraping data from tables in html using the XML package. I have included some code below. I am trying to loop through a series of html pages, each of which contains a single table from which I want to scrape data. However, some of the pages are blank - and so it throws me an error message when it gets to htmlParse(). The loop then closes out and I

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|

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

Hi Paul, Sounds like you have your answer, but for fun I thought I'd try solving your problem using only a regular expression query and base R. I believe this works: > txt <- "Patient had stage IV breast cancer. Nothing matches this sentence. Metastatic and breast match this sentence. French bike champion takes stage IV victory in Tour de France." > pattern <-

Hello All, i was trying to simply run the readHTMLTable on the example published in the package. And on a page I was working on. So running: u = "http://en.wikipedia.org/wiki/List_of_countries_by_population" tables = readHTMLTable(u) returns the following error: Error in tb[["thead"]] : subscript out of bounds looking up this error on the web, didnt give me any hint. Is

Hi R experts, I have been playing with library(XML) recently and found out that readHTMLTable workls flawlessly for some website, but it does give me an error like below ... Error in function (classes, fdef, mtable) : unable to find an inherited method for function "readHTMLTable", for signature "NULL" let's say..for example, this code works fine a

library(XML) download.file('http://polya.umdnj.edu/polya_db2/gene.php?llid=109079&unigene=&submit=Submit','index.html') tables=readHTMLTable("index.html",error=function(...){}) tables readHTMLTable gives me the following errors. Could somebody let me know how to suppress them? Opening and ending tag mismatch: center and table htmlParseEntityRef: expecting

I am using htmlParse from XML library on a paricular website. Sometimes code fails, sometimes it works, most of the time id doesn't and i cannot see why. The file i am trying to parse is  http://www.londonstockexchange.com/exchange/prices-and-markets/international-markets/indices/home/sp-500.html?page=0 Sometimes the following code works n<-readHTMLTable(htmlParse(url)) But most of the

Dear R Helpers, I am still having trouble with the getOptionChain command in quantmod. I have the latest version of quantmod, etc. so I was under the impression that the problem was solved with updates to the package. If someone could let me know what I need to install in order to make this work, I would really appreciate it. My error message as session info are shown below. Thanks a bunch.

Hi, I am using XML::readHTMLTable and getting the below error. Does anyone know why? Does this function not work with https? I didn't see anything in help about that. > library(XML) > wampage<-readHTMLTable('https://hr-workforce-analytics.llnl.gov/wf_pi_pop.html',1) Error in htmlParse(doc) : File https://hr-workforce-analytics.llnl.gov/wf_pi_pop.html does not exist Dan

Hi, I can't get the colClasses option to work in the readHTMLTable function of the XML package. Here's a code fragment: require("XML") doc <- "http://www.nber.org/cycles/cyclesmain.html" table <- getNodeSet(htmlParse(doc),"//table") [[2]] # The main table is the second one because it's embedded in the page table. xt

Hi Bert, Thanks for your reply. It appears that I didn't replace the variable name "sampletxt" with the argument "x" in my function. I've corrected that and now my code seems to be working fine. Paul ________________________________ From: Bert Gunter <bgunter.4567 at gmail.com> Cc: R-help <r-help at r-project.org> Sent: Tuesday, July 11, 2017 2:00 PM

Hi, I am trying to access a website and read its content. The website is a restricted access website that I access through a proxy server (which therefore requires me to enable cookies). I have problems in allowing Rcurl to receive and send cookies. The following lines give me: library(RCurl) library(XML) url <- "http://www.theurl.com" content <- readHTMLTable(url) content

Hi Robert, Thank you for your reply. An attempt to solve this via a regular expression query is particularly helpful. Unfortunately, I don't have much time to play around with this just now. Ultimately though, I think I would like to implement a solution something along the lines of what you have done. I have a book on regular expressions that I am now starting to read. In the meantime, the

Hi, I am extracting positions data from the marine traffic website. The table has a "Timestamp" column which, in the browser, appears with the format yyyy-mm-dd HH:MM (UTC), e.g. 2017-07-10 14:04 (UTC). When I import the table, the same date "2017-07-10 14:04 (UTC)" appears as "1499696500149969650021 minutes ago", This is the more recent date and time. Older

Hi All, I would like to make an invitation to make a collective package with all functions related to TABLES. I know that there are many packages with these functions, the original idea is collect all this functions and to make a single package, because is arduous for the user know all this functions broadcast in many packages. So, I think that the original packages can continue with its

WinXP-x32, R-21.13.0 Dear list, I have a problem that (I think) relates to the interaction between Windows and R. I am trying to scrape a table with data on the Hawai'ian Islands, This is my code: library(XML) u <- "http://en.wikipedia.org/wiki/Hawaii" tables <- readHTMLTable(u) Islands <- tables[[5]] The output is (first set of columns):

Thank you. The line of code you give certainly resolves several of the issues. I didn't realize that font support is such a tough matter to realize. Let me express my gratitude to those who provide this for us in R. On 04-05-11, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote: Oh, please! This is about the contributed package XML, not R and not Windows. Some of