Nonsensor

Generate streams of random data that look good on charts.

Add this line to your application's Gemfile:

gem 'nonsensor'

And then execute:

$ bundle

Or install it yourself as:

$ gem install nonsensor

Note: this gem is experimental and it's guaranteed that the public API will change with each commit. For now.

Currently there are 3 classes of interest Nonsensor::DateSeries, Nonsensor::MidpointDisplacement, Nonsensor::Sensor.

The first two are used to generate new values each time the next! method is called. While Sensor can be used to combine them.

Example:

date = Nonsensor::DateSeries.new(start: Date.new(2018, 10, 10))
date.take!(3).map(&:to_s)
# => ["2018-10-10", "2018-10-10", "2018-10-10"]

temperature = Nonsensor::MidpointDisplacement.new(start: 25, displacement: 5)
temperature.take!(3).map(&:to_s)
# => ["25", "25.215588830195678", "25.137908924728947"]

pressure = Nonsensor::MidpointDisplacement.new(start: 1000, displacement: 25)
pressure.take!(3).map(&:to_s)
# => ["1000", "1002.3275690365925", "1002.1710234288906"]

sensor = Nonsensor::Sensor.new({ date: date, temperature: temperature, pressure: pressure })

puts sensor.take!(10).map { |v| "date: #{v[:date]}, temperature: #{v[:temperature].round(2)}C, pressure: #{v[:pressure].round}hPa" }
# date: 2018-10-13, temperature: 25.32C, pressure: 999hPa
# date: 2018-10-14, temperature: 25.43C, pressure: 999hPa
# date: 2018-10-15, temperature: 25.54C, pressure: 998hPa
# date: 2018-10-16, temperature: 25.77C, pressure: 998hPa
# date: 2018-10-17, temperature: 25.95C, pressure: 1000hPa
# date: 2018-10-18, temperature: 26.11C, pressure: 1000hPa
# date: 2018-10-19, temperature: 26.41C, pressure: 1000hPa
# date: 2018-10-20, temperature: 26.96C, pressure: 1000hPa
# date: 2018-10-21, temperature: 27.04C, pressure: 1000hPa
# date: 2018-10-22, temperature: 27.21C, pressure: 1000hPa

• next! with a bang, because each call will change state of the instance
• take(10) without a bang will return a lazy enumerator
• take!(10) with a bang will return an array, but be careful because there's an infinite loop underneath

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/musialik/nonsensor. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the Nonsensor project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.