I couldn't find this functionality in Blender, so I made this addon for the Graph Editor to solve it. It filters X, Y, Z for both Translations, Euler Rotations and Scales.
Note that this doesn't work for Quaternion rotations.
You can use hide and unhide hotkeys instead of buttons, made them for users who are not familiar with hotkeys. You can use Shift key to make multiple selections and Ctrl to subtract multiple selections.
Fixes bad naming and website
-Previous release
Added Scale buttons
Added Ctrl+key to subtract selection
This extension does not require special permissions.
Very useful with intuitive interface addon for people who work with animation. Recommend :)