> For the complete documentation index, see [llms.txt](https://docs.marpledata.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.marpledata.com/docs/marple-insight/user-manuals/functions/overview.md).

# Overview

## Functions

With Marple Insight Functions you can organise and create custom functions for your projects.

<figure><img src="https://3590686807-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwEBNWlmdcxXBXd7oyqyR%2Fuploads%2FIgBGutMrIkdbSFenaHxT%2Fimage.png?alt=media&amp;token=73c724e2-13c3-4efa-9c74-47a8cd228c10" alt=""><figcaption></figcaption></figure>

These functions can be used throughout all projects in the workspace.

## Overview

You can search for functions by using the search bar at the top.

<figure><img src="https://3590686807-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwEBNWlmdcxXBXd7oyqyR%2Fuploads%2FjP89Csi4Y4c6AqHGYXDy%2FwvnScreenShot%202026-08-20%20at%2012.15.39.png?alt=media&amp;token=452ffc1c-ced0-4584-b81c-93063e735e8d" alt="" width="375"><figcaption></figcaption></figure>

It is possible to filter the search using tags and the toggles 'Only my functions' and 'Only starred'.

<figure><img src="https://3590686807-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwEBNWlmdcxXBXd7oyqyR%2Fuploads%2F5D3wAAhQSLpdTdAXzLS4%2Fimage.png?alt=media&amp;token=0e38a797-e876-405d-9492-81be789d4bdc" alt="" width="375"><figcaption></figcaption></figure>

When you click on the 'Create function' button, a new view opens.

<figure><img src="https://3590686807-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwEBNWlmdcxXBXd7oyqyR%2Fuploads%2FyWeWv6zkm3cNPacEOr0m%2FwvnScreenShot%202026-08-20%20at%2012.27.50.png?alt=media&amp;token=66de1de5-9c32-4bdc-8717-ae82e9000532" alt="" width="375"><figcaption></figcaption></figure>

This view allows you to create a new function.

<figure><img src="https://3590686807-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwEBNWlmdcxXBXd7oyqyR%2Fuploads%2FSAbvWyVZF3w7Frb99tjJ%2FwvnScreenShot%202026-08-20%20at%2011.24.33.png?alt=media&amp;token=b2bf872c-6021-45f7-8747-727bf9cd7d07" alt="" width="375"><figcaption></figcaption></figure>

A preview of the input and output signals of the function is shown on top. This preview uses data from a reference dataset, which you can configure on the bottom right.

Functions can be created fully custom, or by using built-in operations.