How can i export only filled in answers ?

In the Export results screen, you can select a Completion state.

hello ,

i think its a misunderstanding.

if we leave some questions in the survey empty , then the empty answer will also be exported.

i have a survey where the user check some checkboxes , with the checked boxes the questions groups will open . the questions groups that not will be open will also be exported but empty

There is no facility to do that.

As Tpartner says, this is not available.
And to be honest it also doesn't make much sense to me either. Because how will you export a table that way, if different people have answered different questions?

Let's say the first respondent marks checkbox 1 and answers the respective questions, then respondent 2 marks checkbox 2 and answers the respective questions, then how will you want to avoid the "unanswered" questions (which can be different for each respondent)

hello ,

the example i said was for exporting to PDF not to a table

if i now export to pdf there are some pages with only the question and not the answer.
Only for save paper

Understood, makes more sense as PDF.

But still same answer.

You can do your own export system ...

Start by extend PdfWriter : github.com/LimeSurvey/LimeSurvey/blob/ma...export/PdfWriter.php
And extend this function : github.com/LimeSurvey/LimeSurvey/blob/ma...rt/PdfWriter.php#L67

See framagit.org/SondagePro-LimeSurvey-plugi...eAnswers/tree/master this one extend CsvWriter