Once your basic plugin script is working:
You can then quickly test the visualization of the plugin results by visiting the Plugin test result page.
dataset key from earlier here. Next, simply drag your
results.json onto that page to see your plugin output. You can rinse and repeat this process of editing your plugin script and dragging the
results.json file onto that page until you are satisfied with your plugin. In additon to plugin results, it will also allow you to see any notifications that your plugin may generate. See Plugin notifications for more on this.
The next step will be to add visualizations to your plugin results, such as charts, tables, summary scores and more. In addition many API utility functions can be used to save you work. See the API library for more details.