# Managing the Data

## Recording the data

There are multiple places where you can record data in an Empirica experiment.

### To the player

One way of recording the data of players' responses is to set them to the `player` prop itself. You can do so with this command:

```
player.set("name_of_property", value)
```

You can retrieve what you have set as a specific property/answer for the player with:

```
player.get("name_of_property")
```

### To the game, round or stage

If you want to save general data (not specific to one player), you can save it to the `game`, `round` or `stage` with:

```
game.set("name_of_property", value)
round.set("name_of_property", value)
stage.set("name_of_property", value)
```

You can retrieve what you have set as a specific property/answer with:

```
game.get("name_of_property")
round.get("name_of_property")
stage.get("name_of_property")
```

### To the player.game, player.round or player.stage

One way of recording the data of players' responses is to set them to the `player.game`, `player.round` or `player.stage` prop to identify a particular data/response of a *particular player* to a *particular game, round or stage*. You can do so with this command:

```
player.game.set("name_of_property", value)
player.round.set("name_of_property", value)
player.stage.set("name_of_property", value)
```

You can retrieve what you have set as a specific property/answer with:

```
player.game.get("name_of_property")
player.round.get("name_of_property")
player.stage.get("name_of_property")
```

## Exporting the data

Empirica can export your data to CSV format by running from the root of your experiment:

```
$ empirica export
```

This will create a zip file containing multiple csv files. Each file represents an object type (batches, games, players, rounds...). Each line is one of those objects. And each column is one of the keys in the object. For example, if you do `player.set("myvar", 42)`, in the export, you will find a line in the `players.csv` file where the `myvar` column will contain `42`.


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