trend2long: extract_trend List Output to Long Format
In trinker/gtrend: A Wrapper for the GTrendsR Package

Description Usage Arguments Value Note Examples

Reshape a extract_trend list output to long format with a term colun added.

Coerce a data.frame to a trend2long object.

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trend2long(x, ...)

as.trend2long(x, ...)

`x`	An extract_trend list output.
`...`	Currently ignored.

returns a data.frame of trend data by lookup terms.

Returns a a trend2long object.

There is no object checking. It is the user's responsibility to make sure the object being coerced correspondes to a trend2long object.

## Not run: 
library(dplyr)
out <- gtrend_scraper("tyler.rinker@gmail.com", "password",
    c("ebola", "sars", "hiv", "aids", "influenza", "flu", "the cold"))

as.zoo.gtrends(out[[1]])

trend2long(out) %>%
   plot

library(dplyr)
trend2long(out) %>%
   filter(term %in% c("hiv", "ebola", "sars")) %>%
   as.trend2long %>%
   plot

library(ggplot2)
trend2long(out) %>%
    ggplot(aes(x=start, y=term, fill=trend)) +
    geom_tile() +
    scale_fill_gradient(low="black", high="white") +
    scale_x_date(expand = c(0, 0)) +
    theme_bw() + xlab("time")

## End(Not run)