f_extract_images: Get an Image File from the Collection of Files Compressed in...

In pbixr: Access Data and Metadata from 'Microsoft' 'Power BI' Documents

Description

The collection of files compressed in a '.pbix' is searched for images. An image is written to a temporary file. The path of the temporary file and associated properties are returned.

Usage

f_extract_images(input_file_pbix, image_reg)

Arguments

input_file_pbix	Path of the input '.pbix'.
image_reg	Pattern used to search for an image file stored in a collection of files compressed in '.pbix' (e.g., "[.]png|[.]jpg").

Value

A list: [[1]] a temporary location for an image, [[2]] the name, length (kb) and date associated with an image.

Author(s)

Don Diproto

See Also

Uses: f_get_pbix_info, f_get_pbix_fir.

Examples

## Not run: 
# Get dummy data ------------------------------------------------------------
# Create a temporary directory
temp_dir <- file.path(tempdir(),"functionTest")
if(!dir.exists(temp_dir)) {
	dir.create(temp_dir)
}
sample_file_name <- "OR_sample_func.pbix"
pathFileSample <- file.path(temp_dir, sample_file_name)

# See if dummy data already exists in temporary directory
parent_temp_dir <- dirname(temp_dir)
existing_file <- list.files(parent_temp_dir,
pattern = sample_file_name, recursive = TRUE, full.names = TRUE)

# Download the sample .pbix if it doesn't exist
if (length(existing_file) == 0) {
   url_pt1 <- "https://github.com/KoenVerbeeck/PowerBI-Course/blob/"
   url_pt2 <- "master/pbix/TopMovies.pbix?raw=true"
   url <- paste0(url_pt1, url_pt2)
   req <- download.file(url, destfile = pathFileSample, mode = "wb")
} else {
   pathFileSample <- existing_file[1]
}
# Do stuff ------------------------------------------------------------------

image_reg <- "[.]png|[.]jpg"
# Run the function
test <- f_extract_images(pathFileSample, image_reg)
# Plot the image
im <- imager::load.image(test[[1]])
plot(im)
  
## End(Not run)

pbixr documentation built on Oct. 27, 2020, 5:07 p.m.