1.1 KiB
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.