add google analytics

Author: trevorcampbell

source/_config.yml

@@ -48,7 +48,7 @@ html:
   use_multitoc_numbering: true # Continuous numbering across parts/chapters
   extra_navbar: Powered by <a href="https://jupyterbook.org">Jupyter Book</a> # Will be displayed underneath the left navbar.
   extra_footer: "" # Will be displayed underneath the footer.
-  google_analytics_id: "" # A GA id that can be used to track book views.
+  google_analytics_id: "G-7XBFF4RSN2" # A GA id that can be used to track book views.
   home_page_in_navbar: true # Whether to include your home page in the left Navigation Bar
   baseurl: "" # The base URL where your book will be hosted. Used for creating image previews and social links. e.g.: https://mypage.com/mybook/
   comments: