Track Categories variable

Hi,

Can you please tell me how to enable tracking of category views?
Such as here:

https://gist.github.com/randyzwitch/5735223

or

http://randyzwitch.com/google-analytics-custom-variables/

I really like your plugin and do not want to go back to Yoast’s one just because it tracks category views.

Thanks!

http://wordpress.org/plugins/tiny-google-analytics/