extend README

# dlog-viewer – Viewer and Exporter for Keysight dlog Files

dlog-viewer loads voltage, current, and/or power measurements from .dlog files

produced by devices such as the Keysight N6705B DC Power Analyzer.

Measurements can be exported to CSV or plotted on-screen.

produced by devices such as the Keysight N6705B DC Power Analyzer.  It is

specifically meant for .dlog files that were written to a USB stick by the

power analyzer itself, so no Keysight software is required for analyzing them.

This program is not affiliated with Keysight and has not been thoroughly

tested yet. Use at your own risk.

Measurements can be exported to CSV or plotted on-screen via matplotlib.  There

is also support for changepoint detection to automatically identify changes in

the observed device behaviour. This is meant to work around a lack of digital

synchronization signals in the logged power traces.

Analysis options include

This program is not affiliated with Keysight and has not been thoroughly tested, as I only have a singly type of power analyzer at hand.

Use at your own risk.

* plots showing voltage, current, or power over time, and

* changepoint detectiong using the PELT algorithm.

## Usage

See `bin/dlog-viewer --help` for usage details.

Obtain a .dlog file e.g. by using the instrument's data logger feature.

dlog-viewer options include:

* plots showing voltage, current, or power over time (`--plot`),

* simple statistics (`--stat`, `--skip`, `--limit`)

* changepoint detectiong using the PELT algorithm (`--pelt`),

* CSV export of raw measurements (`--csv-export`), and

* JSON export of measurements and detected changepoints (`--json-export`).

See `bin/dlog-viewer --help` for details.

## Dependencies

* Python 3, numpy, matplotlib, xml.etree

* Changepoint detection: python3-ruptures