frodovdr/node-red-nodes
1
0
Fork 0
mirror of https://github.com/node-red/node-red-nodes.git synced 2023-10-10 13:36:58 +02:00
Code Issues Releases Wiki Activity
14b1c3b123
node-red-nodes/function/smooth
History
Dave Conway-Jones 14b1c3b123 correct path of source file 
Thanks @Ltrlg
2016-05-02 19:21:39 +01:00
..
icons Move Smooth node to function folder to better reflect it's category. 2014-09-21 11:14:57 +01:00
17-smooth.html add decimal places option to smooth node 2016-02-14 13:47:04 +00:00
17-smooth.js add decimal places option to smooth node 2016-02-14 13:47:04 +00:00
LICENSE Move Smooth node to function folder to better reflect it's category. 2014-09-21 11:14:57 +01:00
package.json correct path of source file 2016-05-02 19:21:39 +01:00
README.md Info/Doc style updates to core/pi nodes 2016-03-02 13:27:52 +00:00

README.md

node-red-node-smooth

A Node-RED node that provides several simple smoothing algorithms for incoming data values. These include

  • Minimum
  • Maximum
  • Mean
  • Standard Deviation
  • High Pass Smoothing
  • Loww Pass Smoothing

Install

Run the following command in your Node-RED user directory - typically ~/.node-red

npm install node-red-node-smooth

Usage

A simple node to provide various functions across several previous values, including max, min, mean, standard deviation, high and low pass filters.

Max, Min, Mean and Standard Deviation work over a rolling window, based on a specified number of previous values.

The High and Low pass filters use a smoothing factor. The higher the number the more the smoothing. E.g. a value of 10 is similar to an α of 0.1. It is analogous to an RC time constant - but there is no time component to this as the code is based on events arriving.

Note: This node only operates on numbers. Anything else will try to be made into a number and rejected if that fails.