> For the complete documentation index, see [llms.txt](https://docs.infotopics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.infotopics.com/writebackextreme/features/tableau-extension/end-user/data-correction/interpolate.md).
# Interpolate
{% hint style="info" %}
You need to enable PowerTools in the configuration for this feature.
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Data Correction can be used to clean data, enable power tools to bulk edit your values. There’s possibilities such as adding, subtracting, dividing and multiplying with a chosen value. If there are empty values use our powerful Interpolate tool! Sometimes you want to fill in the missing data points automatically, based on related data. This is something the build-in interpolation function can help you with. Interpolation is a method of constructing new datapoints within the range of a set of known datapoints. To use the interpolation function of the Data Correction module, select multiple fields. You must provide data that can be used to interpolate, i.e. the datapoint prior and the datapoint latter to the missing datapoints. When you selected the correct datapoints, you can use the calculator icon above the column and select “Interpolate” to fill in the missing datapoints.
### **Interpolation**
Sometimes you want to fill in the missing data points automatically, based on related data. This is something the build-in interpolation function can help you with. Interpolation is a method of constructing new datapoints within the range of a set of known datapoints.
We use linear interpolation method of [curve fitting](https://en.wikipedia.org/wiki/Curve_fitting) using [linear polynomials](https://en.wikipedia.org/wiki/Linear_polynomial) to construct new data points within the range of a discrete set of known data points.
To use the interpolation function of the Data Correction module, select multiple fields. You must provide data that can be used to interpolate, i.e. the datapoint prior and the datapoint latter to the missing datapoints. When you selected the correct datapoints, you can use the calculator icon above the column and select “Interpolate” to fill in the missing datapoints.
---
# Agent Instructions
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To use the interpolation function of the Data Correction module, select multiple fields. You must provide data that can be used to interpolate, i.e. the datapoint prior and the datapoint latter to the missing datapoints. When you selected the correct datapoints, you can use the calculator icon above the column and select “Interpolate” to fill in the missing datapoints.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## 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, and the optional `goal` query parameter:
```
GET https://docs.infotopics.com/writebackextreme/features/tableau-extension/end-user/data-correction/interpolate.md?ask=