# Advice for a beginner: Substract two time evolutions **URL:** \ **Category:** Kibana\ **Created:** [March 9, 2020, 3:12pm UTC](https://discuss.elastic.co/t/advice-for-a-beginner-substract-two-time-evolutions/222747 "2020-03-09T15:12:37Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![YC777](https://avatars.discourse-cdn.com/v4/letter/y/f19dbf/32.png) [@YC777](https://discuss.elastic.co/u/YC777)\ **Post date:** [March 9, 2020, 3:12pm UTC](https://discuss.elastic.co/t/advice-for-a-beginner-substract-two-time-evolutions/222747/1 "2020-03-09T15:12:38Z")
Hi ! I am fairly new to Elastic, I wish someone could give me some advice. I am building a dashboard and I want to create a vizualisation with two graphs showing a time evolution (cf attached picture), and I want to substract them to have a third graph of the time duration between the two of them. All I know is that it is hard to do it using Vega-lite. ![Inkedtéléchargement (4)_LI](https://us1.discourse-cdn.com/elastic/original/3X/f/c/fc1ce953b099976afb1764d51d29207e0bc08b25.jpeg) Thank you so much in advance ! ---
**Author:** ![Marius\_Dragomir](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marius_dragomir/32/42087_2.png) [@Marius\_Dragomir](https://discuss.elastic.co/u/Marius_Dragomir)\ **Post date:** [March 12, 2020, 3:33pm UTC](https://discuss.elastic.co/t/advice-for-a-beginner-substract-two-time-evolutions/222747/2 "2020-03-12T15:33:09Z")
You can do this with TSVB or Timelion. Both are perfectly suited for this use case. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 9, 2020, 3:33pm UTC](https://discuss.elastic.co/t/advice-for-a-beginner-substract-two-time-evolutions/222747/3 "2020-04-09T15:33:12Z")
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