tokenbrowser (version 0.1.6)

colorscaled_browser: Convert tokens into full texts in an HTML file with color ramp highlighting

Description

Convert tokens into full texts in an HTML file with color ramp highlighting

Usage

colorscaled_browser(
  tokens,
  value,
  alpha = 0.4,
  meta = NULL,
  col_range = c("red", "blue"),
  doc_col = "doc_id",
  token_col = "token",
  doc_nav = NULL,
  token_nav = NULL,
  filename = NULL,
  unfold = NULL,
  span_adjacent = T,
  ...
)

Value

The name of the file where the browser is saved. Can be opened conveniently from within R using browseUrl()

Arguments

tokens

A data.frame with a column for document ids (doc_col) and a column for tokens (token_col)

value

A numeric vector with values between -1 and 1. Determines the color mixture of the scale colors specified in col_range

alpha

Optionally, the alpha (transparency) can be specified, with 0 being fully transparent and 1 being fully colored. This can be a vector to specify a different alpha for each value.

meta

A data.frame with a column for document_ids (doc_col). All other columns are added to the browser as document meta

col_range

The color used to highlight

doc_col

The name of the document id column

token_col

The name of the token column

doc_nav

The name of a column in meta, used to set a navigation tag

token_nav

Alternative to doc_nav, a column in the tokens, used to set a navigation tag

filename

Name of the output file. Default is temp file

unfold

Either a character vector or a named list of vectors of the same length as tokens. If given, all tokens with a tag can be clicked on to unfold the given text. If a list of vectors is given, the values of the columns are concatenated with the column name. E.g. list(doc_id = 1, sentence = 1) will be [doc_id = 1, sentence = 2].

span_adjacent

If TRUE, include adjacent tokens with identical attributes within the same tag

...

Additional formatting arguments passed to create_browser()

Examples

## as an example, scale word colors based on number of characters
scale = nchar(as.character(sotu_data$tokens$token))
scale[scale>6] = scale[scale>6] +20
scale = rescale_var(sqrt(scale), -1, 1)
scale[abs(scale) < 0.5] = NA
url = colorscaled_browser(sotu_data$tokens, value = scale, meta=sotu_data$meta)

# \donttest{
view_browser(url)   ## view browser in the Viewer
# }
if (interactive()) {
browseURL(url)     ## view in default webbrowser
}