# Limit the number density distribution in X, Y & Z direction

**URL:** <https://gromacs.bioexcel.eu/t/limit-the-number-density-distribution-in-x-y-z-direction/3269>\
**Category:** User discussions\
**Tags:** analysis-tools\
**Created:** [December 8, 2021, 3:22pm UTC](https://gromacs.bioexcel.eu/t/limit-the-number-density-distribution-in-x-y-z-direction/3269 "2021-12-08T15:22:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Prasad](https://avatars.discourse-cdn.com/v4/letter/p/9de0a6/32.png) [@Prasad](https://gromacs.bioexcel.eu/u/Prasad)\
**Post date:** [December 8, 2021, 3:22pm UTC](https://gromacs.bioexcel.eu/t/limit-the-number-density-distribution-in-x-y-z-direction/3269/1 "2021-12-08T15:22:43Z")

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GROMACS version:2020.2  
Hi all, Is there a way to limit the calculation of number density distribution along X, Y and Z axis starting from the center of of nanoparticle of choice? Any suggestion will be appreciated.

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**Author:** ![alevilla](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/alevilla/32/439_2.png) [@alevilla](https://gromacs.bioexcel.eu/u/alevilla)\
**Post date:** [December 10, 2021, 10:13am UTC](https://gromacs.bioexcel.eu/t/limit-the-number-density-distribution-in-x-y-z-direction/3269/2 "2021-12-10T10:13:16Z")

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Hi,  
maybe gmx densmap -h ?  
\Alessandra