# Global sensitivity analysis Morris Method

**URL:** https://discourse.julialang.org/t/global-sensitivity-analysis-morris-method/35967
**Category:** Performance
**Tags:** question
**Created:** [March 14, 2020, 2:06pm UTC](https://discourse.julialang.org/t/global-sensitivity-analysis-morris-method/35967 "2020-03-14T14:06:04Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![vijaya](https://avatars.discourse-cdn.com/v4/letter/v/e47774/32.png) [@vijaya](https://discourse.julialang.org/u/vijaya)
#### Post date: [March 14, 2020, 2:06pm UTC](https://discourse.julialang.org/t/global-sensitivity-analysis-morris-method/35967/1 "2020-03-14T14:06:04Z")

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Hi  
In the global sensitvity analysis Morris method example (Lotka Volterra gsa), the input arguments are  
“total\_num\_trajectory=1000,num\_trajectory=150”

The number of parameters in the equations are 4 so generally in the Morris method the number of runs are r\*(p+1) where p is the number of parameters and r the number of different realizations. So here it would be total\_number should be 5xr and num\_traj should be 5. So I am unable to figure out how you get the number 1000 and 150 in the above example. Can you please clarifiy.  
Thanks  
Vijaya