Construct Index based on Google Trend keywords.

Uses the first principal component to construct an index.

ts_gtrends_index(
  keyword,
  time = paste("2007-01-01", Sys.Date()),
  ...,
  sadj = TRUE
)

Arguments

keyword

A character vector with the actual Google Trends query keywords. Defaults to NA which searches for the whole category. Contrary to gtrendsR::gtrends(), if different keywords are used, mulitple queries are sent to Google, and each series is individually normalized.

time

A string specifying the time span of the query. Possible values are:

"now 1-H": Last hour
"now 4-H": Last four hours
"now 1-d": Last day
"now 7-d": Last seven days
"today 1-m": Past 30 days
"today 3-m": Past 90 days
"today 12-m": Past 12 months
"today+5-y": Last five years (default)
"all": Since the beginning of Google Trends (2004)
"Y-m-d Y-m-d": Time span between two dates (ex.: "2010-01-01 2010-04-03")

...

further arguments, passed to gtrendsR::gtrends().

sadj

should the series be seasonally adjusted? Only works if resulting data is monthly.

Examples


tsbox::ts_plot(ts_gtrends_index(c( "Mango", "Zara")))
#> Downloading data for 2007-01-01 2025-04-30
#> Downloading data for 2007-01-01 2025-04-30

Arguments

See also

Examples