Arduino Array Stats

Simple c++ class for Arduino to compute array math for running trend analysis.

Designed to solve problem of maintaining statistics for sensor data either a single n sized array or for data sampled in cyclic buffer at second, minute and hour intervals.

Similar to https://www.arduino.cc/reference/en/libraries/runningaverage/ with enhancements to answer questions

• were values rising / falling?
• by what magnitude?
• what was rate of change?

Also, includes a container wrapper class providing a simple API to maintain time delimited samples.

Computes:

• min / max / mean
• range (diff 1st to last element)
• trend (signed count of ascending / descending values in sequence)
• greatest diff between two elements (magnitude increase / decrease)
• count of consecutive (monotonic) sequence steps (increase / decrease)
• culmulative count of incremental / decrementing steps in sequence

Compatible with c++ and Arduino (ESP32) architectures.

Useage:

examples/ArrayStats - example to maintain single n sized float array

examples/ArrayStatsContainer - demonstrates populating n sized minute, hour & day sample arrays

Example Output:

0 817.00 1 833.00 2 864.00 3 897.00 4 935.00 5 947.00 6 963.00 7 975.00 8 992.00 9 997.00

Array Stats: Min: 817.00 Max: 997.00 Mean: 922.00 Diff: 180.00 Trend: 9.00 Inc Count: 9 Dec Count: 0 Inc Seq Count: 9 Dec Seq Count: 0 Inc Max Diff: 38.00 Dec Max Diff: 0.00