How to remove pages from a pdf?

When using exportapp on a uifigure who contains uilabels with Tex interpreter, the pdf file contains white pages at the end and I want to delete them.

Here an example code:

File='example.pdf';
Path='D:\Downloads\';

f = uifigure;
lb=uilabel(f,"Text",'x^{2}','Interpreter','tex','Position',[50 50 100 100]);
pause(2)
exportapp(f,fullfile(Path,File))
delete(f)

Answer 1

[Isaac Marín]

We can remove pages from a pdf using pdfbox

To delete all pages but the first one, example:

Pd=org.apache.pdfbox.pdmodel.PDDocument;

PDFile=java.io.File(fullfile(Path,File));
document=Pd.load(PDFile);
npages=document.getNumberOfPages
if npages>1
    for i=npages:-1:2
        document.removePage(i-1);
    end
    document.save(fullfile(Path,File));
end
document.close;

Answer 2

[Edward]

In this kind of solution, I use PDFChamp Remove PDF Pages to select the unwanted pages and create a new PDF without them. This is handy when you have a long document and only need to keep certain pages.

You can first open the PDF, identify the pages you don't need, select them, and remove them before saving the updated file. It can be useful for removing blank pages, duplicate pages, or unnecessary sections without recreating the entire document.

For important documents, I’d recommend keeping the original PDF unchanged and saving the edited version as a separate file.