# Use igraph to trigger functions/models on nodes **URL:** \ **Category:** Usage\ **Tags:** R\ **Created:** [10 February 2022 16:45 UTC](https://igraph.discourse.group/t/use-igraph-to-trigger-functions-models-on-nodes/1098 "2022-02-10T16:45:50Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jamesguo](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/jamesguo/32/1080_2.png) [@jamesguo](https://igraph.discourse.group/u/jamesguo)\ **Post date:** [10 February 2022 16:45 UTC](https://igraph.discourse.group/t/use-igraph-to-trigger-functions-models-on-nodes/1098/1 "2022-02-10T16:45:50Z")
Assumed that we have a small graph including some models/functions (their attributes) as nodes and trigger or triggerToRun relationship as edges. I tried to find ways to run some models/functions on nodes using igraph capabilities (e.g., query) but did not succeed. Could you please advise if it is possible by using igraph or point me links? ---
**Author:** ![vtraag](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/vtraag/32/38_2.png) [@vtraag](https://igraph.discourse.group/u/vtraag)\ **Post date:** [16 February 2022 16:22 UTC](https://igraph.discourse.group/t/use-igraph-to-trigger-functions-models-on-nodes/1098/2 "2022-02-16T16:22:45Z")
It is not entirely clear what you are asking for. Could you perhaps post an example of what you would like to do? ---
**Author:** ![jamesguo](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/jamesguo/32/1080_2.png) [@jamesguo](https://igraph.discourse.group/u/jamesguo)\ **Post date:** [20 February 2022 02:13 UTC](https://igraph.discourse.group/t/use-igraph-to-trigger-functions-models-on-nodes/1098/3 "2022-02-20T02:13:56Z")
Hey, to make things simple, assume we have a small graph gt with 5 vertices and 4 edges: gt = Graph(n = 4, edges = [[0, 2], [0, 4], [1, 2], [2, 3]], directed = T) ``` 0 Action ---action 2---> 4 Model 2 (e.g., "run Model 2") | action 1 | downarrow ``` 1 Input ------\> 2 Model x\*x+1 ------\> 3 Output (e.g., 101) (e.g., x = 10) Act 1 = click on action node 0 Act 2 = hover over action node 0 with cursor If Click on the action node then run model x\*x + 1 with input x = 10 and the output will display/store on Output node 3 If hover over action node 0 then “run model 2” will display on Model 2 node. Please advise me or direct me to possible readings. Thank you!