Download data frames, lists, or any R object

Wrapper around bsplus::bs_button() to provide a download button for HTML outputs in R Markdown. Internally, the function writes the file to tempdir(), encodes it, and produces the download button. Currently, Internet Explorer does not support downloading embedded files. For downloading links, files, or directories, see download_link(), download_file(), and download_dir().

Usage

download_this(
  .data,
  ...,
  output_name = NULL,
  output_extension = c(".csv", ".xlsx", ".rds"),
  button_label = "Download data",
  button_type = c("default", "primary", "success", "info", "warning", "danger"),
  icon = "fa fa-save",
  self_contained = FALSE,
  csv2 = TRUE,
  ggsave_args = list()
)

Arguments

.data

A data frame or (named) list to write to disk. See 'Examples' for more details.

...

attributes (named arguments) and children (unnamed arguments) of the button, passed to htmltools::tag().

output_name

Name of of the output file, if NULL uses the deparsed .data object.

output_extension

Extension of the output file. Currently, .csv, .xlsx, and .rds are supported. If a (named) list is passed to the function, only .xlsx and .rds are supported.

button_label

Character (HTML), button label

button_type

Character, one of the standard Bootstrap types

icon

Fontawesome tag e.g.: "fa fa-save", set to NULL to not show any icon.

self_contained

A boolean to specify whether your HTML output is self-contained. Default to FALSE.

csv2

A boolean to specify whether to use readr::write_csv2() in case the output_extension is chosen as '.csv'. If FALSE, readr::write_csv() will be used instead. Default to TRUE.

ggsave_args

List of arguments to pass to ggplot2::ggsave, e.g.: list(height = 5).

Value

htmltools::tag, <button>

Warning

This example will write the mtcars dataset to tempdir() and produce the download button for the file mtcars dataset.csv with the fa fa-save icon on the Download data label.

Examples

if (FALSE) { # \dontrun{
# Passing a data frame to the function
mtcars %>%
  download_this(
    output_name = "mtcars dataset",
    output_extension = ".csv",
    button_label = "Download data",
    button_type = "warning",
    icon = "fa fa-save"
  )

# Passing a list with data frames to the function
list(mtcars, iris) %>%
  download_this(
    output_name = "mtcars and iris datasets",
    output_extension = ".xlsx",
    button_label = "Download data",
    button_type = "warning",
    icon = "fa fa-save"
  )

# Passing a named list with data frames to the function
list("mtcars dataset" = mtcars, "iris dataset" = iris) %>%
  download_this(
    output_name = "mtcars and iris datasets",
    output_extension = ".xlsx",
    button_label = "Download data",
    button_type = "warning",
    icon = "fa fa-save"
  )

# Passing any R object to the function
vector_example <- 1:10
linear_model <- lm(mpg ~ gear, data = mtcars)

list(mtcars, iris, vector_example, linear_model) %>%
  download_this(
    output_name = "datasets, vector, and linear model",
    output_extension = ".rds",
    button_label = "Download as rds",
    button_type = "warning",
    icon = "fa fa-save"
  )
} # }