# Continuous Poisson Input

**URL:** <https://brian.discourse.group/t/continuous-poisson-input/326>\
**Category:** Science, Projects, and Showcases\
**Created:** [1 March 2021 11:07 UTC](https://brian.discourse.group/t/continuous-poisson-input/326 "2021-03-01T11:07:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![I\_H](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@I\_H](https://brian.discourse.group/u/I_H)\
**Post date:** [1 March 2021 11:07 UTC](https://brian.discourse.group/t/continuous-poisson-input/326/1 "2021-03-01T11:07:57Z")

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Hello everyone,

I’m new here and also pretty new at programming. I am doing a master thesis on snakes Infra-red map formation using Brian2. The main idea is to use an input as noise and connect it with a stdp-synapse to the other neuron layers to form a neural map.

For the input I have used:  
input = PoissonGroup(N,rates=45\*Hz)

I need a continuous Input to use as the noise but I couldn’t find anything in the Brian Documentation. Could you please help me on how to tackle this problem.

Thank you in advance!  
Iris

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**Author:** ![mstimberg](https://yyz2.discourse-cdn.com/free1/user_avatar/brian.discourse.group/mstimberg/32/11_2.png) [@mstimberg](https://brian.discourse.group/u/mstimberg)\
**Post date:** [1 March 2021 12:28 UTC](https://brian.discourse.group/t/continuous-poisson-input/326/2 "2021-03-01T12:28:40Z")

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Hi and welcome. Could you give a bit more details on your input? When you say, “continuous input” do you mean that you want a noisy current instead of individual spike events? Or is the input not completely random but rather varying over time?

Here’s a pointer to one of the forms of noise you can use in equations: [Models and neuron groups — Brian 2 2.4.2 documentation](https://brian2.readthedocs.io/en/stable/user/models.html#noise)  
And here are various ways of including inputs in models: [Input stimuli — Brian 2 2.4.2 documentation](https://brian2.readthedocs.io/en/stable/user/input.html)

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**Author:** ![I\_H](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@I\_H](https://brian.discourse.group/u/I_H)\
**Post date:** [3 May 2021 16:27 UTC](https://brian.discourse.group/t/continuous-poisson-input/326/3 "2021-05-03T16:27:56Z")

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Thank you very much for your answer!

Iris