# Column statistics

> For the complete documentation index, see [llms.txt](https://kotlin.github.io/dataframe/llms.txt).

Statistics on columns are described:

* [here](summarystatistics.html) for summary statistics, like [sum](sum.html) and [mean](mean.html)

* [here](cumulativestatistics.html) for cumulative statistics, like [cumSum](cumsum.html)

API reference: [DataColumn](https://kotlin.github.io/dataframe/api-docs/core/org.jetbrains.kotlinx.dataframe/-data-column/index.html)