Here is my problem: I'm trying to set up a flow where I receive temperature data from my connected Photon, and then based on the temperature data calculate the linear regression. I just cannot for the life of me figure out how to use the regression node. What I've done so far: I made a function to…

Unfortunately your flow is not importable, please see below for how to fix that. You can edit your previous flow. [image] How to share code or flow json FAQs To share code samples or flow json in this forum, you need to take care to format it properly so that it is display…

thanks, Colin. I'm still new to this :sweat_smile:

Change the second debug node to Show Complete Message and show us what you see from the two debug nodes. Expand the outputs so as to see all the data.

The debug attached to the "Switch for regression" node is outputting the data in the correct format (I know the temperature is really high but that's no worry). [Screen Shot 2020-01-20 at 11.19.26 AM]

You said it was giving you a blank equation, it doesn't seem to be blank. What happens if you give it another couple of values, obviously it can't calculate it on just one.

I left the photon running for a couple hours, the regression equation still reads "y = 0x + NaN"

Make a simple flow that uses an inject and function node to send three sample data messages to the regression node and post that here so we can try it.

I tried injecting a simulated temperature and a timestamp into the regression node. I also tried using a "join" node. I figured that using the msg.topic would work, but no luck. [{"id":"52fa474f.4d1438","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"eeb6d5ba.4ff948","type":"inject…

I meant something like this, which works fine [{"id":"b1ae979e.46e4d","type":"inject","z":"6f3191a3.0ba77","name":"Inject Sample 1","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":119,"y":76,"wires":[["9fce9d45.d6cc18"]]},{"id":"9fce9d45.d6cc18…

Thanks for the example. I think there's a problem with my code in my "switch for regression" function node. When I disconnect it from my regression node and connect inject nodes instead (as you did in your example), the regression works fine. I'll play around with the code and see if I can get it to…

Node-RED

Node-RED Forum

Regression Node - Help

General

Colin 19 January 2020 21:57 2

Unfortunately your flow is not importable, please see below for how to fix that. You can edit your previous flow.

Topic		Replies	Views
Regression node - x(time) format General	4	332	12 November 2021
[Announce] node-red-contrib-statistics & node-red-contrib-regression Share Your Nodes	0	663	26 May 2018
Can someone try this flow to see if the following plot is generated without the straight line Dashboard	36	1118	1 January 2021
Extracting part of the data from JSON payload, perform calcs and combine them back General	15	2617	30 June 2021
Solving mathematical functions made from dashboard inputs General	54	3405	1 May 2020

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Regression Node - Help

Related topics