rvest | Simple web scraping for R | Scraper library

by tidyverse R Version: v1.0.3 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | rvest Summary

rvest is a R library typically used in Automation, Scraper applications. rvest has no bugs, it has no vulnerabilities and it has medium support. However rvest has a Non-SPDX License. You can download it from GitHub.

rvest helps you scrape (or harvest) data from web pages. It is designed to work with magrittr to make it easy to express common web scraping tasks, inspired by libraries like beautiful soup and RoboBrowser. If you’re scraping multiple pages, I highly recommend using rvest in concert with polite. The polite package ensures that you’re respecting the robots.txt and not hammering the site with too many requests.

Support

Quality

Security

License

Reuse

Support

rvest has a medium active ecosystem.

It has 1400 star(s) with 332 fork(s). There are 87 watchers for this library.

It had no major release in the last 12 months.

There are 15 open issues and 275 have been closed. On average issues are closed in 251 days. There are 4 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of rvest is v1.0.3

Quality

rvest has 0 bugs and 0 code smells.

Security

rvest has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

rvest code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

rvest has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

rvest releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

It has 11 lines of code, 0 functions and 2 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

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rvest Key Features

No Key Features are available at this moment for rvest.

rvest Examples and Code Snippets

No Code Snippets are available at this moment for rvest.

Community Discussions

Trending Discussions on rvest

purrr safely over a function and save the links which are giving errors

rowwise apply rvest html_nodes() and store in a new column the output

Using RVest to Create HTML Table And Then Using Manipulating and Cleaning into DF

How can I fix this issue in R with webscraping?

Add Group Subheader and Subtotal Rows to data.frame or table in R

Polite Webscraping with Rvest in R

How do I scrape only one section of text from a webpage in R?

Select option in dropdown box using Rselenium

How to save result as "ND" when there is no record? rvest and R

How to aggregate data from years to decades and plot them?

QUESTION

purrr safely over a function and save the links which are giving errors

Asked 2022-Apr-15 at 19:54

I have some links:

...

ANSWER

Answered 2022-Apr-15 at 19:54

We can wrap the function as input to possibly or safely

Source https://stackoverflow.com/questions/71888285

QUESTION

rowwise apply rvest html_nodes() and store in a new column the output

Asked 2022-Apr-09 at 21:09

I have some urls that I would like to scrape. I end up with 3 data frames (for example):

...

ANSWER

Answered 2022-Apr-09 at 21:09

We may use rowwise, check if the value in 'class' is non NA, apply the code and create a list column (else return NA)

Source https://stackoverflow.com/questions/71811527

QUESTION

Using RVest to Create HTML Table And Then Using Manipulating and Cleaning into DF

Asked 2022-Mar-16 at 14:17

I am looking to scrape the following web page:

https://kubears.com/sports/football/stats/2021/assumption/boxscore/11837

... specifically, the "Play-by-Play" tab in the top menu. Getting the information was pretty simple to do:

...

ANSWER

Answered 2022-Mar-16 at 14:17

Here's a way to achieve your result using functions from the tidyverse. There are a lot of different ways to get the same results, this is just one way. The code is structured in three main parts: first, building a big dataframe by binding the rows of the multiple lists, second removing the useless rows that were in the original dataframe, and third create all the variables.

The tab dataframe is also slightly different from your page original input, see the code in the data and functions part. I basically changed the column names so that they are not the same and rename them col1 and col2.

Only a few different functions are actually used. I created extract_digit, which extracts the nth occurrence of a number from a string. str_extract and str_match extract the specified pattern from a string, while str_detects only detects (and returns a logical, TRUE or FALSE). word gets the nth word from a string.

Source https://stackoverflow.com/questions/71444112

QUESTION

How can I fix this issue in R with webscraping?

Asked 2022-Mar-09 at 12:46

I am trying to pull across data from within over 800 links and putting it onto a table. I have tried using chrome selector gadget but cannot work out how to get it to loop. I must have spent 40 hours and keep getting error codes. I need to pull the same information from li:nth-child(8) , li:nth-child(8) strong and another couple text boxes of information. I have tried following a YouTube video and I just changed the names and links but otherwise maintained consistency and it just will not work.

...

ANSWER

Answered 2022-Mar-09 at 12:46

We can use simple for loop,

Source https://stackoverflow.com/questions/71408828

QUESTION

Add Group Subheader and Subtotal Rows to data.frame or table in R

Asked 2022-Mar-02 at 18:11

Objective

I wish to add subheader and subtotal/margin rows within a table. Ultimately, I am looking for a structure shown below, which I will export to Excel with openxlsx and writeData.

2019 2020 2021 A A1 1001 1157 911 A2 1005 803 1110 A3 1125 897 1190 Total A 3131 2857 3211 B B1 806 982 1098 B2 1106 945 1080 B3 1057 1123 867 Total B 2969 3050 3045 C C1 847 1087 1140 C2 1146 966 1176 C3 1071 915 892 Total C 3064 2968 3208 Total All 9164 8875 9464

I suspect the subheaders and subtotals are completely different questions, but I am asking both here in case there is a common method related to each.

Reproducible Code So Far

Create the Sample Data (long format):

...

ANSWER

Answered 2022-Mar-02 at 18:04

Instead of applying adorn_totals on the entire summary, use group_modify and then convert to gt

Source https://stackoverflow.com/questions/71326250

QUESTION

Polite Webscraping with Rvest in R

Asked 2022-Feb-22 at 13:44

I have code that scrapes a website but does so in a way that after so many scrapes from a run, I get a 403 forbidden error. I understand there is a package in R called polite that does the work of figuring out how to run the scrape to the hosts requirements so the 403 won't occur. I tried my best at adapting it to my code but I'm stuck. Would really appreciate some help. Here is some sample reproducible code with just a few links from many:

...

ANSWER

Answered 2022-Feb-22 at 13:44

Here is my suggestion how to use polite in this scenario. The code creates a grid of teams and seasons and politely scrapes the data.

The parser is taken from your example.

Source https://stackoverflow.com/questions/71201215

QUESTION

How do I scrape only one section of text from a webpage in R?

Asked 2022-Feb-14 at 18:51

I am trying to scrape specific portions of html based journal articles. For example if I only wanted to scrape the "Statistical analyses" sections of article in a Frontiers publication how could I do that? Since the number of paragraphs and locations of the section change for each article, the selectorGadget isn't helping.

https://www.frontiersin.org/articles/10.3389/fnagi.2010.00032/full

I've tried using rvest with html_nodes and xpath, but I'm not having any luck. The best I can do is begin scraping at the section I want, but can't get it to stop after. Any suggestions?

...

ANSWER

Answered 2022-Feb-14 at 18:51

Since there is a "Results" section after each "Statistical analyses" try

Source https://stackoverflow.com/questions/71116705

QUESTION

Select option in dropdown box using Rselenium

Asked 2022-Feb-08 at 13:40

I'm trying to use RSelenium to select the theme 'loneliness' from the drop-down box in the tab mental health and wellbeing from https://analytics.phe.gov.uk/apps/covid-19-indirect-effects/#. I can get Rselenium to go the the mental health tab but I haven't had any luck in selecting the 'loneliness' theme. I would be grateful for any steer as I've reviewed many posts from Stack Overflow (you can chuckle at my many failed attempts) and still no joy.

I would be really grateful for any pointers!

...

ANSWER

Answered 2022-Feb-07 at 11:45

Looks like the dropdowns are using selectize.js. Something like the below seems to work:

Source https://stackoverflow.com/questions/70989818

QUESTION

How to save result as "ND" when there is no record? rvest and R

Asked 2022-Jan-23 at 20:48

I have these two example html: url1.html ; url2.html

In URL1.html there is no information (71) and in URL2.html there is.

I'm using this code in R:

...

ANSWER

Answered 2022-Jan-23 at 20:48

We could check the length and if it is 0 (length(character(0)) is 0), change the value to 'ND'

Source https://stackoverflow.com/questions/70826317

QUESTION

How to aggregate data from years to decades and plot them?

Asked 2022-Jan-23 at 12:56

This is the graph that I would like to reproduce:

but for that I have to change the years column because on the graph the x axis is in decades. By what means could I accomplish this ?

This is what I did to extract the data from the site (https://ourworldindata.org/famines) :

...

ANSWER

Answered 2022-Jan-23 at 11:19

Firstly, to convert the periods to decades, you need to extract a year for each period, based on which the calculation will be made. From your comment above, it looks like you need to extract the end year for each period. Given the data, regular expressions are used below to do this (and packages dplyr and stringr).

Source https://stackoverflow.com/questions/70817735

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install rvest

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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