A web scraping example

README.org

@@ -21,6 +21,10 @@ data using the R programming environment
 
  * [[./script/iteration.R][Lapply, apply and for loop: brief introduction]]
 
+** Web scraping
+
+ * [[./script/scraping2.R][Web scraping example]]
+
 ** Interesting packages
 
  * [[./script/roadoi_package.R]['roadoi']]

script/scraping2.R

@@ -0,0 +1,49 @@
+#' ---
+#' title: ""
+#' date: "2022-06-24"
+#' author: "Jose"
+#' output:
+#'   html_document:
+#'    code_folding: show
+#'    toc: yes
+#'    toc_float:
+#'      smooth_scroll: true
+#'    df_print: paged
+#'    highlight: zenburn
+#' ---
+
+#' remove objects
+
+rm(list = ls())
+
+#' Libraries
+
+library(rvest)
+library(crul)
+
+url <- 'https://www.mdpi.com/search?q=pasture&journal=remotesensing'
+
+url_parse = url
+
+a = read_html(url)
+
+html_children(a)[1] |> html_text()
+
+str(a)
+
+html_elements(a, "h1")
+
+html_elements(a, "h2")
+
+html_elements(a, "h3")
+
+html_elements(a, "h4")
+
+html_elements(a, "h2") |> html_text2()
+
+html_elements(a, "p1")
+
+html_elements(a, "p2")
+
+html_elements(a, "p3")
+