Is there any visual LaTeX-table editor for linux? I want something where I can load existing LaTeX-tables, modify them and save it in LaTeX.
I am not sure about the editor but the following trick works. Use something like
sed to surgically cut existing LaTeX table out of your document and pipe it into the temporary file. Then you can use Siag to open your table as a
comma-separated values file (CSV) specifying
& as a field separator. You can edit then your table. You can save it in the same format and upload into the document using
sed. It is probably interesting for you to know that Siag can export a valid LaTeX table code for an already existing CSV or even some other formats.