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johan
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June 21, 2011

android

Reventer Tutorial

June 21, 2011 | By | 3 Comments

At present Reventer is still in early development. For those who would like to use it and give feedback, here is a quick tutorial to get you started.

First Start

Until you have created at least one event, the first screen you will get when you start Reventer will look like this:



Click on the “add event” button to create a new event. An event is anything that can happen, like getting a headache, traveling somewhere or measuring something like a payment.

Adding an event

After you’ve clicked on the “add event” button you will be presented with a screen where you have to provide 2 details about the event:

  • What it is called
  • What type of event it is



    • There are three types of events available at the moment:

  • Timestamp – Any event for which you only want to record the time that it happened. Like keeping track of when you get headaches
  • Number – An event for which you want to record when it happened
    along with some numerical value, like your temperature or blood pressure (this doesn’t all need to be medical, and I’ll hopefully come up with some better examples soon)
  • Duration – Any event for which you want to record the duration, like the start and end times for a journey.



    After entering the name, just press the button identifying which type of event you are creating.

    Adding More Events

    To add more events, press the menu button on your phone or device, which will give you the option to manage events:



    Adding Event Instances

    Event instances refer to whenever an event actually happens.

    For timestamp events it is easy to add an event instance, just hit the big red + button next to the appropriate event. For our example using headaches, you would hit the + button every time you get a headache.

    IMPORTANT NOTE: Because events are grouped by either hours or days you will only have a dot to begin with. As you add more event instances over time your graph will get more interesting.

    For number events you will get a prompt to enter a value like below:



    To record a duration event instance, just push the play button next to the event.



    Once the event ends, you hit the stop button and the duration will be recorded in minutes.



    Grouping Event Instances

    This is where it gets interesting. Say you are keeping track of when you are getting headaches. It may be useful to get some idea of whether this is happening at certain times of day. This is where grouping comes in. To change what event instances are grouped by, just tap on the green graph on the main screen, and you will be presented with four options:



  • Hour: The event instances are grouped by the number of occurrences per hour, or, for number and duration events, by the number or duration of the event instance per hour
  • Day: The event instances are grouped by the number of occurrences per day, or, for number and duration events, by the number or duration of the event instances per day
  • Hour of Day: Here grouping is by the hour of the day in 24 hour format. Useful for seeing if event instances are occurring at specific times of day.
  • Day of Week: Here grouping is by the day of the week. Useful for seeing if event instances are occuring on specific days of the week


    • Exporting Events

    To export events wih all there instances you have two options. Either export to the SD Card(Export to CSV) or Export to any of your installed application on your Android device (send CSV).

    Once exported you have all the details of every recorded event instance.



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    Comments

    1. September 27, 2011

      Reply
      Tom Louie

      I’m experimenting with tracking a daily event that occurs roughly at the same time, give or take a few minutes, for example:

      2011-09-27 09:25:23
      2011-09-26 09:23:12
      2011-09-25 09:26:42
      2011-09-24 09:39:53

      etc…

      I’d like to be able to graph this such that I can see the average daily occurrence time, but the Group By Hour of Day (avg) graph doesn’t show minutes.

    2. October 5, 2011

      Reply
      ezuall

      Thank you for the feedback. I’ll look into the best way to add this granularity. In the meantime it could be useful to send this to google docs and plot it there, or send to your e-mail account and plot the data using a graphing tool like R.

    3. November 12, 2011

      Reply
      Slomifier

      I need to be able to see patterns in small amounts of time. I’d like to see minutes added as well.

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