In the Window
menu, open Show View
-> Other ...
and type log
to find it.
Write "LogCat" in Quick Access edit box in your eclipse window (top right corner, just before Open Prospective button). And just select LogCat it will open-up the LogCat window in your current prospect
In the "Window" menu, open "Open Perspective" -> "Debug".
click On the plus image icon(you see the below image at status bar), and then select "Logcat"....
Go to your desired perspective. Go to 'Window->show view' menu.
If you see logcat there, click it and you are done.
Else, click on 'other' (at the bottom), chose 'Android'->logcat.
Hope that helps :-)
Source: Stackoverflow.com