# HTM vs. ARIMA
**URL:** https://discourse.numenta.org/t/htm-vs-arima/2817
**Category:** Numenta Theory
**Created:** [September 11, 2017, 12:25pm UTC](https://discourse.numenta.org/t/htm-vs-arima/2817 "2017-09-11T12:25:59Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@kaustabpal](https://discourse.numenta.org/u/kaustabpal)
#### Post date: [September 11, 2017, 12:26pm UTC](https://discourse.numenta.org/t/htm-vs-arima/2817/1 "2017-09-11T12:26:00Z")
Can anyone please let me know if the HTM prediction model follows the ARIMA prediction model?
If not, how are they different?
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### Author:  [@rhyolight](https://discourse.numenta.org/u/rhyolight)
#### Post date: [September 11, 2017, 4:17pm UTC](https://discourse.numenta.org/t/htm-vs-arima/2817/2 "2017-09-11T16:17:56Z")
@subutai did a study a long time ago when we called it “CLA”. See here:
- [http://lists.numenta.org/pipermail/nupic\_lists.numenta.org/2013-September/001411.html](http://lists.numenta.org/pipermail/nupic_lists.numenta.org/2013-September/001411.html)
- [http://lists.numenta.org/pipermail/nupic\_lists.numenta.org/attachments/20130924/5cce6c6d/attachment-0001.pdf](http://lists.numenta.org/pipermail/nupic_lists.numenta.org/attachments/20130924/5cce6c6d/attachment-0001.pdf) (PDF)
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### Author:  [@subutai](https://discourse.numenta.org/u/subutai)
#### Post date: [September 11, 2017, 4:20pm UTC](https://discourse.numenta.org/t/htm-vs-arima/2817/3 "2017-09-11T16:20:36Z")
They are completely different. A description of HTM (with a short ARIMA comparison) is here:
> **[Continuous Online Sequence Learning with an Unsupervised Neural Network Model](http://www.mitpressjournals.org/doi/abs/10.1162/NECO_a_00893)**
>
> The ability to recognize and predict temporal sequences of sensory inputs is vital for survival in natural environments. Based on many known properties of cortical neurons, hierarchical temporal memory (HTM) sequence memory recently has been proposed...
A paper directly comparing the two on a bunch of datasets is here (I don’t know the author):
> **[3d533a54a661de7d659993f4263688fbaacd.pdf](https://pdfs.semanticscholar.org/4976/3d533a54a661de7d659993f4263688fbaacd.pdf)**
>
> 2.03 MB
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### Author:  [@kaustabpal](https://discourse.numenta.org/u/kaustabpal)
#### Post date: [September 12, 2017, 6:34am UTC](https://discourse.numenta.org/t/htm-vs-arima/2817/4 "2017-09-12T06:34:23Z")
> [@subutai](#):
>
> They are completely different
Can you please elaborate in what sense they are completely different?
I am still in learning phase so all these will be really helpful. Thank you.
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### Author:  [@rhyolight](https://discourse.numenta.org/u/rhyolight)
#### Post date: [September 12, 2017, 3:30pm UTC](https://discourse.numenta.org/t/htm-vs-arima/2817/5 "2017-09-12T15:30:51Z")
Well one is completely biologically derived. The other is basically just a math function. I think you’ll need to investigate yourself about what ARIMA is. Share your comparison with us afterwards if you come up with anything interesting?