Rotate selected pages of a pdf file — rotate

If the toolkit Pdftk is available in the system, it will be called to rotate the given pages of the seleted PDF files

See the reference for detailed usage of pdftk.

rotate_pages(
  rotatepages,
  page_rotation = c(0, 90, 180, 270),
  input_filepath = NULL,
  output_filepath = NULL,
  overwrite = TRUE
)

Arguments

rotatepages	a vector of page numbers to be rotated
page_rotation	An integer value from the vector c(0, 90, 180, 270). Each option sets the page orientation as follows: north: 0, east: 90, south: 180, west: 270. Note that the orientation cannot be cummulatively changed (eg. 90 (east) will always turn the page so the beginning of the page is on the right side)
input_filepath	the path of the input PDF file. The default is set to NULL. IF NULL, it prompt the user to select the folder interactively.
output_filepath	the path of the output PDF file. The default is set to NULL. IF NULL, it prompt the user to select the folder interactively.
overwrite	If a file exists in `output_filepath`, should it be overwritten.

Value

this function returns a PDF document with the remaining pages

References

https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/

Author

Priyanga Dilini Talagala

Examples

if (FALSE) {
# This command prompts the user to select the file interactively.
# Rotate page 2 and 6 to 90 degrees clockwise
rotate_pages(rotatepages = c(3,6), page_rotation = 90)
}

if (FALSE) {
dir <- tempdir()
require(lattice)
for(i in 1:3) {
pdf(file.path(dir, paste("plot", i, ".pdf", sep = "")))
print(xyplot(iris[,1] ~ iris[,i], data = iris))
dev.off()
}
output_file <- file.path(dir, paste('Full_pdf.pdf',  sep = ""))
staple_pdf(input_directory = dir, output_file)
input_path <- file.path(dir, paste("Full_pdf.pdf",  sep = ""))
output_path <-  file.path(dir, paste("Rotated_pgs_pdf.pdf",  sep = ""))
rotate_pages(rotatepages = c(2,3), page_rotation = 90,  input_path, output_path)
}