custom_grep: Retrieve Text Between XML Tags
In easyPubMed: Search and Retrieve Scientific Publication Records from PubMed

Description Usage Arguments Details Value Author(s) References Examples

Extract text form a string containing XML or HTML tags. Text included between tags of interest will be returned. If multiple tagged substrings are found, they will be returned as different elements of a list or character vector.

1	custom_grep(xml_data, tag, format = "list")

`xml_data`	String (of class character and length 1): corresponds to the PubMed record or any string including XML/HTML tags.
`tag`	String (of class character and length 1): the tag of interest (does NOT include < > chars).
`format`	c("list", "char"): specifies the format for the output.

The input string has to be a character string (length 1) containing tags (HTML or XML format). If an XML Document is provided as input, the function will rise an error.

List or vector where each element corresponds to an in-tag substring.

Damiano Fantini damiano.fantini@gmail.com

https://www.data-pulse.com/dev_site/easypubmed/

try({
  ## extract substrings based on regular expressions
  string_01 <- "I can't wait to watch the <strong>Late Night Show with" 
  string_01 <- paste(string_01, "Seth Meyers</strong> tonight at <strong>11:30</strong>pm CT!")
  print(string_01)
  custom_grep(xml_data = string_01, tag = "strong", format = "char")
  custom_grep(xml_data = string_01, tag = "strong", format = "list")
}, silent = TRUE)