select_pages {staplr}

Select pages from a file

Description

If the toolkit Pdftk is available in the system, it will be called to combine the selected pages in a new pdf file.

See the reference for detailed usage of pdftk.

Usage

select_pages(
  selpages,
  input_filepath = NULL,
  output_filepath = NULL,
  overwrite = TRUE
)

Arguments

selpages

a vector of page numbers to be selected

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

TRUE if the operation was succesfful. FALSE if the operation fails.

Author(s)

Granville Matheson, Priyanga Dilini Talagala

References

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

Examples

if (requireNamespace("lattice", quietly = TRUE)) {
dir <- tempfile()
dir.create(dir)
for(i in 1:3) {
pdf(file.path(dir, paste("plot", i, ".pdf", sep = "")))
print(lattice::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_filepath = output_file)
input_path <- file.path(dir, paste("Full_pdf.pdf",  sep = ""))
output_path <-  file.path(dir, paste("trimmed_pdf.pdf",  sep = ""))
select_pages(selpages = 1, input_path, output_path)
}