# About the Radial distribution function

**URL:** <https://gromacs.bioexcel.eu/t/about-the-radial-distribution-function/8841>\
**Category:** User discussions\
**Tags:** mdrun, analysis-tools\
**Created:** [April 10, 2024, 9:59am UTC](https://gromacs.bioexcel.eu/t/about-the-radial-distribution-function/8841 "2024-04-10T09:59:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ok1](https://avatars.discourse-cdn.com/v4/letter/o/9d8465/32.png) [@ok1](https://gromacs.bioexcel.eu/u/ok1)\
**Post date:** [April 10, 2024, 9:59am UTC](https://gromacs.bioexcel.eu/t/about-the-radial-distribution-function/8841/1 "2024-04-10T09:59:25Z")

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Hello. I calculated the Radial distribution function using GMX RDF, where I selected the same index group using-ref and -sel. Does it make sense to do so? After that, I made the result as shown, I do not understand the meaning of these two columns of data, I would like to ask, what is their meaning?  
 ![d8e34286cbc148b3d87da6061edba499](https://europe1.discourse-cdn.com/flex017/uploads/bioexcel1/original/2X/c/c276c8e4fdb48c8732280bcb4b97847702b096be.png)