# Adding an OPC tag to a random number

**URL:** <https://forum.inductiveautomation.com/t/adding-an-opc-tag-to-a-random-number/19453>\
**Category:** Ignition\
**Created:** [August 29, 2018, 6:18pm UTC](https://forum.inductiveautomation.com/t/adding-an-opc-tag-to-a-random-number/19453 "2018-08-29T18:18:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![carolineuchoa.estuda](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@carolineuchoa.estuda](https://forum.inductiveautomation.com/u/carolineuchoa.estuda)\
**Post date:** [August 29, 2018, 6:18pm UTC](https://forum.inductiveautomation.com/t/adding-an-opc-tag-to-a-random-number/19453/1 "2018-08-29T18:18:40Z")

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Hello!

I need to add an OPC tag to a random value to become another tag (like a modified version of the opc tag). I tried to create an expression tag but it seems I can’t use gauss function in the expression. Anyone could help me? How do I do that?

Thanks!