# Sampling data for chart

**URL:** <https://discourse.nodered.org/t/sampling-data-for-chart/10982>\
**Category:** Dashboard\
**Created:** [10 May 2019 08:25 UTC](https://discourse.nodered.org/t/sampling-data-for-chart/10982 "2019-05-10T08:25:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![accuser](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/accuser/32/4282_2.png) [@accuser](https://discourse.nodered.org/u/accuser)\
**Post date:** [10 May 2019 08:25 UTC](https://discourse.nodered.org/t/sampling-data-for-chart/10982/1 "2019-05-10T08:25:13Z")

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I am capturing output from an MVHR unit, taking readings every 1s (for control purposes). I want to chart this over 24 hours, but need a lot less data points. Is there a node or flow in existence that will let me sample the data every 15 minutes? How else might I solve this?

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**Author:** ![ukmoose](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ukmoose/32/13_2.png) [@ukmoose](https://discourse.nodered.org/u/ukmoose)\
**Post date:** [10 May 2019 08:44 UTC](https://discourse.nodered.org/t/sampling-data-for-chart/10982/2 "2019-05-10T08:44:38Z")

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It depends what you mean by sample. Take a look at:

the delay node that can rate limit  
the rbe node that "reports by exception"  
the smooth node...

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<div class="post-metadata">

**Author:** ![accuser](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/accuser/32/4282_2.png) [@accuser](https://discourse.nodered.org/u/accuser)\
**Post date:** [10 May 2019 08:55 UTC](https://discourse.nodered.org/t/sampling-data-for-chart/10982/3 "2019-05-10T08:55:35Z")

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Thank you - a combination of smooth and delay did the trick.