Hints for octave in xenial

Errors

• icon-not-found
  The icon '/usr/share/octave/4.0.0/imagelib/octave-logo.svg' was not found in the archive. This issue can have multiple reasons:
  • The icon is not present in the archive.
  • The icon is in a wrong directory.
  • The icon is not available in a suitable size (at least 64x64px)
  To make the icon easier to find, place it in /usr/share/icons/hicolor/<size>/apps and ensure the Icon= value of the .desktop file is set correctly.
• gui-app-without-icon
  The GUI application (application which has a .desktop file for the XDG menu and Type=Application) with AppStream-ID 'www.octave.org-octave.desktop' has been found, but we could not find a matching icon.