Tag: random data

Adding Time Range Generation to Data Diluvium

Following up on my previous posts about adding humidity and temperature data generation to Data Diluvium, I’m now adding a Time Range generator. I decided this would be a nice addition to give any graphing of the data a good look. This will complete the trio of generators I needed for my TimeScale DB setup. While humidity and temperature provide the environmental data, the Time Range generator ensures we have properly spaced time points for our time-series analysis.

Why Time Range Generation?

When working with TimeScale DB for time-series data, having evenly spaced time points is crucial for accurate analysis. I’ve found that many of my experiments require data points that are:

  • Evenly distributed across a time window
  • Properly spaced for consistent analysis
  • Flexible enough to handle different sampling rates
  • Random in their starting point to avoid bias

The Implementation

I created a Time Range generator that produces timestamps based on a 2-hour window. Here’s what I considered:

  • Default 2-hour time window
  • Even distribution of points across the window
  • Random starting point within a reasonable range
  • Support for various numbers of data points

Here’s how I implemented this in Data Diluvium:

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Generating Realistic Humidity Data for TimeScale DB with Data Diluvium

For next steps of why I set up TimeScale DB up for local dev, and being able to just do things, I need two new data generators over on Data Diluvium. One for humidity, which will be this post, and one for temperature, which will be next.

Why Humidity Data?

When working with TimeScale DB for time-series data, having realistic environmental data is crucial. I’ve found that humidity is a particularly important parameter that affects everything from agriculture to HVAC systems. Having realistic humidity data is essential for:

  • Testing environmental monitoring systems
  • Simulating weather conditions
  • Developing IoT applications
  • Training machine learning models for climate prediction

The Implementation

I created a humidity generator that produces realistic values based on typical Earth conditions. Here’s what I considered:

  • Average humidity ranges (typically 30-70% for most inhabited areas)
  • Daily variations (higher in the morning, lower in the afternoon)
  • Seasonal patterns
  • Geographic influences
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Go Library Data Generation Timings

Recently I put together some quick code to give some timings on the various data generation libraries available for Go. For each library there were a few key pieces of data generation I wanted to time:

  • First Name – basically a first name of some sort, like Adam, Nancy, or Frank.
  • Full Name – something like Jason McCormick or Sally Smith.
  • Address – A basic street address, or whatever the generator might provide.
  • User Agent – Such as that which is sent along with the browser response.
  • Color – Something like red, blue, green, or other color beyond the basics.
  • Email – A fully formed, albeit faked email address.
  • Phone – A phone number, ideally with area code and prefix too.
  • Credit Card Number – Ideally a properly formed one, which many of the generators seem to provide based on VISA, Mastercard, or related company specifications.
  • Sentence – A stand multi-word lorem ipsum based sentence would be perfect.

I went through and searched for libraries that I wanted to try out. Of all the libraries I found I narrowed it down to three specific libraries. When I add the imports for these libraries, by way of how Go works, it gives you the repo locations:

  • “github.com/bxcodec/faker” – faker – Faker generates data based on a Struct, which is a pretty cool way to determine what type of data you want and to get it returned in a particularly useful format.
  • “github.com/icrowley/fake” – fake – Fake is a library inspired by the ffaker and forgery Ruby gems. Not that you’d be familiar with those, but if you are you have instant insight into how this library works.
  • “github.com/malisit/kolpa” – kolpa – This is another data generator that creates fake data for various types of data, structures, strings, sentences, and more.

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