# Apply Conditional Statement

![](https://894783789-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LPHXQ1I3gb93zpLrLZf%2Fuploads%2Fgit-blob-f0e4f905850c8298caf602d3c59b67104ec1ee0b%2FApply_Conditional_Statement.png?alt=media)

![](https://894783789-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LPHXQ1I3gb93zpLrLZf%2Fuploads%2Fgit-blob-540920b2d89d939369626b9fc3f85e07b530611c%2FApply_Conditional_Statement.png?alt=media) - [\[source code\]](https://github.com/ladybug-tools/ladybug-grasshopper/blob/master/ladybug_grasshopper/src/LB%20Apply%20Conditional%20Statement.py)

Apply a conditional statement to a data collection.

### Inputs

* **data \[Required]**

A list of aligned Data Collections to be evaluated against the \_statement.

* **statement \[Required]**

A conditional statement as a string (e.g. a > 25). The variable of the first data collection should always be named 'a' (without quotations), the variable of the second list should be named 'b', and so on. For example, if three data collections are connected to \_data and the following statement is applied: '18 < a < 26 and b < 80 and c > 2' The resulting collections will only include values where the first data collection is between 18 and 26, the second collection is less than 80 and the third collection is greater than 2.

### Outputs

* **data**

A list of Data Collections that have been filtered by the \_statement.


---

# 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://docs.ladybug.tools/ladybug-primer/components/1_analyzedata/apply_conditional_statement.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.