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scrap a table from a non-html website with R yet examples shown are for hmtl
2019 Community Moderator ElectionScraping a complex HTML table into a data.frame in RGetting with errors with ChIPQC - “Error in (function (classes, fdef, mtable)”Can't close mysql connections in Runable to find an inherited method for function ‘vif’ for signature ‘“integer”’plot graphs in RGetting the centroids of Lat and Longitude in a data frameHow would I load data from a website table into R environment?Variogram for a “gridded” dataCan't submit and scrap html table using rvestWebscraping in R with XML Package “Null” errorpid func doesn't work with pairwiseAlignment R
I have an issue. I am trying to scrap the two tables from a non-html website.
This is the website:
https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp
Yet, I am following something I should not but do not find any answer. This is what I have tried:
library(tidyverse)
library(rvest)
library(XML)
library(httr)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
poptable <- readHTMLTable(url, which = 1)
And get this error:
Error in (function (classes, fdef, mtable) : unable to find an
inherited method for function ‘readHTMLTable’ for signature ‘"NULL"’
In addition: Warning message: XML content does not seem to be XML:
'https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp'
I thought regardless of the asp website type, I still can use the function readHTMLTable. Is there any alternative to this. I haven't found any yet and struggled for hours to get something out.
r web-scraping
asked Mar 7 at 14:03
GaBGaB
1058
add a comment |
I have an issue. I am trying to scrap the two tables from a non-html website.
This is the website:
https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp
Yet, I am following something I should not but do not find any answer. This is what I have tried:
library(tidyverse)
library(rvest)
library(XML)
library(httr)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
poptable <- readHTMLTable(url, which = 1)
And get this error:
Error in (function (classes, fdef, mtable) : unable to find an
inherited method for function ‘readHTMLTable’ for signature ‘"NULL"’
In addition: Warning message: XML content does not seem to be XML:
'https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp'
I thought regardless of the asp website type, I still can use the function readHTMLTable. Is there any alternative to this. I haven't found any yet and struggled for hours to get something out.
r web-scraping
asked Mar 7 at 14:03
GaBGaB
1058
It isn't a "non-HTML" site. Maybe the HTML is rendered dynamically, in which case there are tools like Selenium that can help and are documented in other SO questions
– camille
Mar 7 at 15:14
add a comment |
I have an issue. I am trying to scrap the two tables from a non-html website.
This is the website:
https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp
Yet, I am following something I should not but do not find any answer. This is what I have tried:
library(tidyverse)
library(rvest)
library(XML)
library(httr)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
poptable <- readHTMLTable(url, which = 1)
And get this error:
Error in (function (classes, fdef, mtable) : unable to find an
inherited method for function ‘readHTMLTable’ for signature ‘"NULL"’
In addition: Warning message: XML content does not seem to be XML:
'https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp'
I thought regardless of the asp website type, I still can use the function readHTMLTable. Is there any alternative to this. I haven't found any yet and struggled for hours to get something out.
r web-scraping
asked Mar 7 at 14:03
GaBGaB
1058
I have an issue. I am trying to scrap the two tables from a non-html website.
This is the website:
https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp
Yet, I am following something I should not but do not find any answer. This is what I have tried:
library(tidyverse)
library(rvest)
library(XML)
library(httr)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
poptable <- readHTMLTable(url, which = 1)
And get this error:
Error in (function (classes, fdef, mtable) : unable to find an
inherited method for function ‘readHTMLTable’ for signature ‘"NULL"’
In addition: Warning message: XML content does not seem to be XML:
'https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp'
I thought regardless of the asp website type, I still can use the function readHTMLTable. Is there any alternative to this. I haven't found any yet and struggled for hours to get something out.
r web-scraping
r web-scraping
asked Mar 7 at 14:03
GaBGaB
1058
asked Mar 7 at 14:03
GaBGaB
1058
edited Mar 7 at 14:52
GaB
asked Mar 7 at 14:03
GaBGaB
1058
asked Mar 7 at 14:03
GaBGaB
1058
asked Mar 7 at 14:03
GaBGaB
1058
1058
It isn't a "non-HTML" site. Maybe the HTML is rendered dynamically, in which case there are tools like Selenium that can help and are documented in other SO questions
– camille
Mar 7 at 15:14
add a comment |
It isn't a "non-HTML" site. Maybe the HTML is rendered dynamically, in which case there are tools like Selenium that can help and are documented in other SO questions
– camille
Mar 7 at 15:14
It isn't a "non-HTML" site. Maybe the HTML is rendered dynamically, in which case there are tools like Selenium that can help and are documented in other SO questions
– camille
Mar 7 at 15:14
It isn't a "non-HTML" site. Maybe the HTML is rendered dynamically, in which case there are tools like Selenium that can help and are documented in other SO questions
– camille
Mar 7 at 15:14
add a comment |
1 Answer
1
active
oldest
votes
Actually, that's pretty straightfoward (based on @lukeA's answer):
library(rvest)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
page <- read_html(url)
nodes <- html_nodes(page, "table") # you can use Selectorgadget to identify the node
table <- html_table(nodes[[1]]) # each element of the nodes list is one table that can be extracted
head(table)
Code Main Specialty Title
1 Surgical Specialties Surgical Specialties Surgical Specialties
2 100 GENERAL SURGERY
3 101 UROLOGY
4 110 TRAUMA & ORTHOPAEDICS
5 120 ENT
6 130 OPHTHALMOLOGY
Selectorgadget can be installed here: Selectorgadget by Hadley Wickham
answered Mar 7 at 14:11
ha_puha_pu
2578
I see, it worked. Thank you. I haven't found any previous issues. Yet it was there. Can you pleas help, is the asp website a html? Because lukeA's answer shows it for an html table. What is the difference?
– GaB
Mar 7 at 14:50
1
I guest that all websites are html-pages with various elements. The tricky part is to identify the "names" those elements that you are interested in. That's what you can use the Selectorgadget for. With Selectorgadget I figured out that the relevant tables are "table" nodes and that's what I put into thehtml_nodescommand. If you are not interested in tables, you might usehtml_textinstead ofhtml_tablein the next step.
– ha_pu
Mar 7 at 14:56
thank you ha_pu
– GaB
Mar 12 at 14:18
add a comment |
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Actually, that's pretty straightfoward (based on @lukeA's answer):
library(rvest)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
page <- read_html(url)
nodes <- html_nodes(page, "table") # you can use Selectorgadget to identify the node
table <- html_table(nodes[[1]]) # each element of the nodes list is one table that can be extracted
head(table)
Code Main Specialty Title
1 Surgical Specialties Surgical Specialties Surgical Specialties
2 100 GENERAL SURGERY
3 101 UROLOGY
4 110 TRAUMA & ORTHOPAEDICS
5 120 ENT
6 130 OPHTHALMOLOGY
Selectorgadget can be installed here: Selectorgadget by Hadley Wickham
answered Mar 7 at 14:11
ha_puha_pu
2578
I see, it worked. Thank you. I haven't found any previous issues. Yet it was there. Can you pleas help, is the asp website a html? Because lukeA's answer shows it for an html table. What is the difference?
– GaB
Mar 7 at 14:50
1
I guest that all websites are html-pages with various elements. The tricky part is to identify the "names" those elements that you are interested in. That's what you can use the Selectorgadget for. With Selectorgadget I figured out that the relevant tables are "table" nodes and that's what I put into thehtml_nodescommand. If you are not interested in tables, you might usehtml_textinstead ofhtml_tablein the next step.
– ha_pu
Mar 7 at 14:56
thank you ha_pu
– GaB
Mar 12 at 14:18
add a comment |
Actually, that's pretty straightfoward (based on @lukeA's answer):
library(rvest)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
page <- read_html(url)
nodes <- html_nodes(page, "table") # you can use Selectorgadget to identify the node
table <- html_table(nodes[[1]]) # each element of the nodes list is one table that can be extracted
head(table)
Code Main Specialty Title
1 Surgical Specialties Surgical Specialties Surgical Specialties
2 100 GENERAL SURGERY
3 101 UROLOGY
4 110 TRAUMA & ORTHOPAEDICS
5 120 ENT
6 130 OPHTHALMOLOGY
Selectorgadget can be installed here: Selectorgadget by Hadley Wickham
answered Mar 7 at 14:11
ha_puha_pu
2578
I see, it worked. Thank you. I haven't found any previous issues. Yet it was there. Can you pleas help, is the asp website a html? Because lukeA's answer shows it for an html table. What is the difference?
– GaB
Mar 7 at 14:50
1
I guest that all websites are html-pages with various elements. The tricky part is to identify the "names" those elements that you are interested in. That's what you can use the Selectorgadget for. With Selectorgadget I figured out that the relevant tables are "table" nodes and that's what I put into thehtml_nodescommand. If you are not interested in tables, you might usehtml_textinstead ofhtml_tablein the next step.
– ha_pu
Mar 7 at 14:56
thank you ha_pu
– GaB
Mar 12 at 14:18
add a comment |
Actually, that's pretty straightfoward (based on @lukeA's answer):
library(rvest)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
page <- read_html(url)
nodes <- html_nodes(page, "table") # you can use Selectorgadget to identify the node
table <- html_table(nodes[[1]]) # each element of the nodes list is one table that can be extracted
head(table)
Code Main Specialty Title
1 Surgical Specialties Surgical Specialties Surgical Specialties
2 100 GENERAL SURGERY
3 101 UROLOGY
4 110 TRAUMA & ORTHOPAEDICS
5 120 ENT
6 130 OPHTHALMOLOGY
Selectorgadget can be installed here: Selectorgadget by Hadley Wickham
answered Mar 7 at 14:11
ha_puha_pu
2578
Actually, that's pretty straightfoward (based on @lukeA's answer):
library(rvest)
url <- "https://www.datadictionary.nhs.uk/web_site_content/supporting_information/main_specialty_and_treatment_function_codes_table.asp"
page <- read_html(url)
nodes <- html_nodes(page, "table") # you can use Selectorgadget to identify the node
table <- html_table(nodes[[1]]) # each element of the nodes list is one table that can be extracted
head(table)
Code Main Specialty Title
1 Surgical Specialties Surgical Specialties Surgical Specialties
2 100 GENERAL SURGERY
3 101 UROLOGY
4 110 TRAUMA & ORTHOPAEDICS
5 120 ENT
6 130 OPHTHALMOLOGY
Selectorgadget can be installed here: Selectorgadget by Hadley Wickham
answered Mar 7 at 14:11
ha_puha_pu
2578
answered Mar 7 at 14:11
ha_puha_pu
2578
answered Mar 7 at 14:11
ha_puha_pu
2578
answered Mar 7 at 14:11
ha_puha_pu
2578
2578
I see, it worked. Thank you. I haven't found any previous issues. Yet it was there. Can you pleas help, is the asp website a html? Because lukeA's answer shows it for an html table. What is the difference?
– GaB
Mar 7 at 14:50
1
I guest that all websites are html-pages with various elements. The tricky part is to identify the "names" those elements that you are interested in. That's what you can use the Selectorgadget for. With Selectorgadget I figured out that the relevant tables are "table" nodes and that's what I put into thehtml_nodescommand. If you are not interested in tables, you might usehtml_textinstead ofhtml_tablein the next step.
– ha_pu
Mar 7 at 14:56
thank you ha_pu
– GaB
Mar 12 at 14:18
add a comment |
I see, it worked. Thank you. I haven't found any previous issues. Yet it was there. Can you pleas help, is the asp website a html? Because lukeA's answer shows it for an html table. What is the difference?
– GaB
Mar 7 at 14:50
1
I guest that all websites are html-pages with various elements. The tricky part is to identify the "names" those elements that you are interested in. That's what you can use the Selectorgadget for. With Selectorgadget I figured out that the relevant tables are "table" nodes and that's what I put into thehtml_nodescommand. If you are not interested in tables, you might usehtml_textinstead ofhtml_tablein the next step.
– ha_pu
Mar 7 at 14:56
thank you ha_pu
– GaB
Mar 12 at 14:18
I see, it worked. Thank you. I haven't found any previous issues. Yet it was there. Can you pleas help, is the asp website a html? Because lukeA's answer shows it for an html table. What is the difference?
– GaB
Mar 7 at 14:50
I see, it worked. Thank you. I haven't found any previous issues. Yet it was there. Can you pleas help, is the asp website a html? Because lukeA's answer shows it for an html table. What is the difference?
– GaB
Mar 7 at 14:50
1
1
I guest that all websites are html-pages with various elements. The tricky part is to identify the "names" those elements that you are interested in. That's what you can use the Selectorgadget for. With Selectorgadget I figured out that the relevant tables are "table" nodes and that's what I put into the
html_nodes command. If you are not interested in tables, you might use html_text instead of html_table in the next step.– ha_pu
Mar 7 at 14:56
I guest that all websites are html-pages with various elements. The tricky part is to identify the "names" those elements that you are interested in. That's what you can use the Selectorgadget for. With Selectorgadget I figured out that the relevant tables are "table" nodes and that's what I put into the
html_nodes command. If you are not interested in tables, you might use html_text instead of html_table in the next step.– ha_pu
Mar 7 at 14:56
thank you ha_pu
– GaB
Mar 12 at 14:18
thank you ha_pu
– GaB
Mar 12 at 14:18
add a comment |
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It isn't a "non-HTML" site. Maybe the HTML is rendered dynamically, in which case there are tools like Selenium that can help and are documented in other SO questions
– camille
Mar 7 at 15:14