Node Red datakit

Data analysis tools for payload input data. This is a wrapper around the datakitjs Node library.

Inputs

Normally, the value of msg.payload is saved into the data set. When a message with a topic that ends in a datakit function name is received, that datakitjs is calculated and output as the msg.payload. For example, a message with the topic data/mean would output the mean of the data received so far. Optionally, the function name can be stripped from the topic. For datakitjs functions that require a parameter, the parameter is passed in using msg.payload.

Functions

The functions in the datakitjs library that are supported are:

Statistical Methods

• mean
• sd
• vari
• cov
• reg

Convenience Methods

• seq
• rep
• isclose
• sum
• prod
• min
• max

Random Numbers

• exp
• norm
• uni

In addition, two other functions are implemented:

• size - returns the size of the data set
• clear - clears the data set

For more detailed information about the functions see the datakitjs API documentation.