# Scenario/set_ev

> Set a specific `EV` in a `Scenario` instance.

---

## Description
Set a specific `EV` instance in `scenario.EVs`.
This results in `valid = false`

## Syntax
```matlab
scenario = set_ev(scenario,i,ev)
scenario = scenario.set_ev(i,ev)
```

## Input Arguments
| Name | Type | Description |
|------|------|--------------|
| `scenario` | *Scenario object* | Scenario object |
| `i` | *positive integer* | Index of an EV |
| `ev` | *EV object* | An `EV` instance that replaces `EVs(i)` |

## Output Arguments
| Name | Type | Description |
|------|------|--------------|
| `scenario` | *Scenario object* | Scenario object with modified `EVs` |