> For the complete documentation index, see [llms.txt](https://help.sbtinstruments.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sbtinstruments.com/software/not-in-the-new-structure/pages/measurement-group/growth-curve-group-type.md).

# Growth curve group type

## Plots

The growth curve group type generates two plots based on the following columns:

<table><thead><tr><th width="190">Plot</th><th>Column on x-axis</th><th width="279">Column(s) on y-axis</th></tr></thead><tbody><tr><td>Growth curve</td><td><a href="https://help.sbtinstruments.com/software/access/pages/measurement-group#how-calchpi-is-calculated">calcHPI</a></td><td>Cells/mL</td></tr><tr><td>CIZE</td><td><a href="https://help.sbtinstruments.com/software/access/pages/measurement-group#how-calchpi-is-calculated">calcHPI</a></td><td>CIZE</td></tr></tbody></table>

## CIZE

[CIZE](/more/software/cell-size-cize.md) *(Cell-Impedance-derived siZe Estimate)* is the average electrical diameter of cells. It is primarily driven by cell size. Other factors may influence CIZE, such as cell morphology and electrical phenotype.

To get a CIZE value, the cells/mL concentration must be above the [limit of detection](/advanced/not-in-the-new-structure/limits-of-detection.md).

## Labels

Use labels to compare growth curves. Each label shows two traces: concentration (solid line) on the primary y-axis and CIZE (dashed line) on the secondary y-axis.

All measurements with an empty *Label* column correspond to the *Unlabelled* trace.

<div data-with-frame="true"><figure><img src="https://1710807222-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F1GbcuPi5f9BbK7GoqDt1%2Fuploads%2Fgit-blob-3f6e96ff10925e281c4107dec1f916dda8416bfd%2Faccess--growth-curve-group-cize-labels.png?alt=media" alt=""><figcaption><p>Example growth-curve measurement group. It contains two <em>E. coli</em> growth curves: one in CD medium and one in LB medium. Plots are grouped by label. Concentration (solid line) uses the primary y-axis (left). CIZE (dashed line) uses the secondary y-axis (right).</p></figcaption></figure></div>


---

# 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 by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://help.sbtinstruments.com/software/not-in-the-new-structure/pages/measurement-group/growth-curve-group-type.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.