# Aggregated Recorder

## General Description

This Recorder is used to aggregate across multiple other Recorder objects.

The class provides a method to produce a complex aggregated recorder by taking the results of other records. The *.values()* method first collects unaggregated values from the provided recorders. These are then aggregated on a per scenario basis and returned by this classes *.values()* method. This method allows *AggregatedRecorder* to be used as a recorder for in other *AggregatedRecorder* instances.

By default the same *agg\_func* function is used for both steps, but an optional *recorder\_agg\_func* can undertake a different aggregation across scenarios. For example summing recorders per scenario, and then taking a mean of the sum totals.[ ](https://pywr.github.io/pywr-docs/master/api/generated/pywr.recorders.NumpyArrayNodeCurtailmentRatioRecorder.html)[API Reference](https://pywr.github.io/pywr-docs/master/api/generated/pywr.recorders.AggregatedRecorder.html#pywr.recorders.AggregatedRecorder)

## Attributes

<table><thead><tr><th width="155">Name</th><th width="395">Description</th><th>Required</th></tr></thead><tbody><tr><td>model</td><td>pywr.core.Model</td><td>Optional</td></tr><tr><td>recorders</td><td>The other <em>Recorder</em> instances to perform aggregation over</td><td>Optional</td></tr><tr><td>agg_func</td><td>Scenario aggregation function to use when <em>aggregated_value</em> is called (default=”mean”)</td><td>Optional</td></tr><tr><td>recorder_agg_func</td><td>Recorder aggregation function to use when <em>aggregated_value</em> is called (default=`agg_func`)</td><td>Optional</td></tr></tbody></table>

## Example

coming soon...

```json
{

}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://water-strategy.gitbook.io/waterstrategy/modeling-basics/recorders/statistical-recorders/aggregated-recorder.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.