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README.md

Koia Data Visualization

What is Koia?

Koia is an angular-based, open-source web application for visualizing and analyzing table-like data structures. It offers a modern and minimalistic approach for creating flat tables, pivot-tables, summaries, relationship graphs and charts of your data.

Koia has originally been developed for analyzing and visualizing log data collected and structured with the Retrospective Log Analyzer alt text from files (local and remote), Docker and Kubernetes.

Use Koia straight away at https://www.koia.io or continue reading.

Why Koia?

Koia differs from similar programs mainly in that the context to the original data is never lost. You are always only a mouseclick apart from seeing the raw data on which the displayed element or value is based.

Next to this, Koia enables the uploading of multiple data sets, so it is possible to create graphics based on different data without opening a lot of tabs in your browser but switching between the data sets in one tab.

How it works

Data is loaded from files (CSV, Excel or JSON) to the browser's IndexedDB or a local CouchDB through Koia itself or it may be written to it by a third party program. Uploaded data from an individual file are represented by a scene. You can switch between different scenes as you please to create diagrams based on different data.

The data can be viewed, filtered and sorted in a raw data table or it may be refined and displayed as charts, relationship graphs, summary or pivot tables with a few mouseclicks. To gain insights into your data, Koia offers a variety of chart types such as: Pie charts, donut charts, bar charts, line charts, area charts, scatter charts and sunburst charts.

Besides simply visualizing data, Koia also features time and value filters to present a closer look at diagrams and the numbers behind them.

When satisfied with the outcome, users can save the current view or export data to use it elsewhere.

Picture 1: Relationship graph showing the time/log level relation of log entries and a pie/scatter chart showing the occurance of the log levels.

Picture 2: Line chart of market prices over the course of several years and the according summmaries with the average prices for each year and in total.

Getting Started

It is recommended to use CouchDB as described down below since the data scenes in Koia will be lost when the browser cache is emptied when using the IndexedDB.

Installing

  1. Download and install CouchDB from http://couchdb.apache.org/#download. Follow the installation wizard steps.

  2. Open http://127.0.0.1:5984/_utils#setup and perform CouchDB single node setup according to http://docs.couchdb.org/en/stable/setup/single-node.html. You will get asked for an admin username and password, choose the default admin/admin or whatever suits you.

  3. Configure CORS by changing [http] and [cors] entries within the configuration file $COUCHDB_HOME/etc/local.ini as follows:

    [httpd]
    enable_cors = true
    
    [cors]
    origins = *
    methods = GET,POST,PUT,DELETE
    credentials = true
    
  4. After editing the configuration file, CouchDB should be restarted to have the changes applied.

  5. Start Koia by opening https://www.koia.io.

License

Koia is MIT licensed. Copyright (c) 2019 centeractive ag.

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