> For the complete documentation index, see [llms.txt](https://docs.abi.am/abi-omicss-guide-2021/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.abi.am/abi-omicss-guide-2021/week-4/r-programming/practice-2.md).

# Practice 2

This page focuses on practice with data frames. You can find the practice sheet below.

Open the file in your browser and complete the prompts. To check your work, refer to the [Answers and Explanations ](/abi-omicss-guide-2021/conclusion.md)page.

{% file src="/files/FwGxjV21AUSBel5KzFcG" %}

## Congratulations!

If you made it here, then congratulations! You have successfully completed this section. Move to the next portion of the guide with the arrow buttons below.