SCOPUS Search

This function wraps generic_elsevier_api to give a scopus search from the Elsevier Scopus Search API

Searches SCOPUS to get information about documents on an author.

scopus_search(query, api_key = NULL, count = 200,
  view = c("STANDARD", "COMPLETE"), start = 0, verbose = TRUE,
  max_count = 20000,
  http = "https://api.elsevier.com/content/search/scopus",
  headers = NULL, wait_time = 0, ...)

sciencedirect_search(count = 100, ...)

scidir_search(count = 100, ...)

Arguments

query	Query string to search on SCOPUS
api_key	API Key for Elsevier
count	number of records to retrieve (below 200 for STANDARD, below 25 for COMPLETE views, see https://dev.elsevier.com/api_key_settings.html).
view	type of view to give, see https://api.elsevier.com/documentation/ScopusSearchAPI.wadl
start	where should the records start gathering
verbose	Print diagnostic messages
max_count	Maximum count of records to be returned.
http	Address for scopus API
headers	additional headers to be added to add_headers
wait_time	The time in seconds to wait across consecutive requests of a single search (when records > 25)
...	Arguments to be passed to the query list for GET

Value

List of entries from SCOPUS

Examples

if (have_api_key()) {
res = scopus_search(query = "all(gene)", max_count = 20,
count = 10)
df = gen_entries_to_df(res$entries)
head(df$df)
sci_res = sciencedirect_search(query = "heart+attack AND text(liver)",
max_count = 30, count = 25)
sci_df = gen_entries_to_df(sci_res$entries)

nt = sciencedirect_search(query = "title(neurotoxin)", max_count = 20,
count = 10)
nt_df = gen_entries_to_df(nt$entries)
nt_df = nt_df$df
}
#> The query list is: 
#> list(query = "all(gene)", count = 10, start = 0, view = "STANDARD")
#> $query
#> [1] "all(gene)"
#> 
#> $count
#> [1] 10
#> 
#> $start
#> [1] 0
#> 
#> $view
#> [1] "STANDARD"
#> 
#> Response [https://api.elsevier.com/content/search/scopus?query=all%28gene%29&count=10&start=0&view=STANDARD]
#>   Date: 2019-09-17 16:30
#>   Status: 200
#>   Content-Type: application/json;charset=UTF-8
#>   Size: 16.5 kB
#> 
#> Total Entries are 6634109
#> Maximum Count is 20
#> 2 runs need to be sent with current count
#> 
  |                                                                            
  |======================================================================| 100%
#> Number of Output Entries are 20
#> The query list is: 
#> list(query = "heart+attack AND text(liver)", count = 25, start = 0, 
#>     view = "STANDARD")
#> $query
#> [1] "heart+attack AND text(liver)"
#> 
#> $count
#> [1] 25
#> 
#> $start
#> [1] 0
#> 
#> $view
#> [1] "STANDARD"
#> 
#> Response [https://api.elsevier.com/content/search/sciencedirect?query=heart%2Battack%20AND%20text%28liver%29&count=25&start=0&view=STANDARD]
#>   Date: 2019-09-17 16:30
#>   Status: 200
#>   Content-Type: application/json;charset=UTF-8
#>   Size: 9.03 kB
#> 
#> Total Entries are 10
#> Number of Output Entries are 10
#> The query list is: 
#> list(query = "title(neurotoxin)", count = 10, start = 0, view = "STANDARD")
#> $query
#> [1] "title(neurotoxin)"
#> 
#> $count
#> [1] 10
#> 
#> $start
#> [1] 0
#> 
#> $view
#> [1] "STANDARD"
#> 
#> Response [https://api.elsevier.com/content/search/sciencedirect?query=title%28neurotoxin%29&count=10&start=0&view=STANDARD]
#>   Date: 2019-09-17 16:30
#>   Status: 429
#>   Content-Type: text/xml;charset=UTF-8
#>   Size: 226 B
#> <error-response>
#>     <error-code>RATE_LIMIT_EXCEEEDED</error-code>
#>     <error-message>Rate of requests exceeds specified limits. Recommend lower...
#> Error in get_results(query, start = init_start, count = count, verbose = verbose,     headers = headers, ...): Too Many Requests (RFC 6585) (HTTP 429).