https://github.com/ashawley/mitx-ctl-sc1x

MITx: CTL.SC1x in Scala and Breeze
https://github.com/ashawley/mitx-ctl-sc1x

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MITx: CTL.SC1x in Scala and Breeze

• Host: GitHub
• URL: https://github.com/ashawley/mitx-ctl-sc1x
• Owner: ashawley
• License: other
• Created: 2016-04-03T00:51:57.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2016-04-06T03:16:47.000Z (over 8 years ago)
• Last Synced: 2024-10-31T12:46:48.770Z (about 2 months ago)
• Language: Scala
• Size: 11.7 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
## Supply Chain Fundamentals in Scala

Solutions to the practice problems, not the graded assignments, using

the [Scala](http://scala-lang.org) programming language and a

numerical processing library for Scala, called

[Breeze](http://github.com/scalanlp/breeze).  Answers are validated

using [specs2](http://specs2.org), a test framework for Scala.

* [MITx: CTL.SC1x Supply Chain Fundamentals](https://www.edx.org/course/supply-chain-fundamentals-mitx-ctl-sc1x)

Source code is released under the MIT license (see LICENSE):

Copyright (C) 2016, Aaron S. Hawley

### Running the test suite

Use the Scala simple build tool, [sbt](http://www.scala-sbt.org):

    $ sbt

    > test

    [info] Week1Spec

    [info] 

    [info] + W1PP2P1

    [info] + W1PP2P2

    [info] + W1PP2P3

    [...]

    [info] + W1PP7P3

    [info] + W1PP7P4

    [info] + W1PP7P5

    [info] 

    [info] 

    [info] Total for specification Week1Spec

    [info] Finished in 1 second, 334 ms

    [info] 13 examples, 0 failure, 0 error

    [info] 

    [...]

    [info] 

    [info] Passed: Total 34, Failed 0, Errors 0, Passed 34

    [success] Total time: 7 s

To automatically compile and re-run the tests when a source file

changes, using triggered execution feature of sbt

    > ~test

To run a single specification, use `testOnly`:

    > ~testOnly org.edx.mitx.ctl.sc1x.Week3Spec

To run only tests in a spec that match a regular expression:

    > ~testOnly org.edx.mitx.ctl.sc1x.Week2Spec -- ex W2PP4P3C

    > testOnly org.edx.mitx.ctl.sc1x.Week2Spec -- ex W2PP4P3C

    [info] Week2Spec

    [info] 

    [info] + W2PP4P3C

    [info] 

    [info] Total for specification Week2Spec

    [info] Finished in 2 seconds, 454 ms

    [info] 1 example, 0 failure, 0 error

    [info] 

    [info] Passed: Total 1, Failed 0, Errors 0, Passed 1

    [success] Total time: 4 s

    

### Using the REPL

To run the sbt console, with access to the breeze library:

    > console

    [info] Starting scala interpreter...

    [info] 

    Welcome to Scala 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_40).

    Type in expressions for evaluation. Or try :help.

    

    scala> breeze.linalg.DenseVector(1d,2,3,4,5)

    res0: breeze.linalg.DenseVector[Double] = DenseVector(1.0, 2.0, 3.0, 4.0, 5.0)

    

    scala> breeze.stats.meanAndVariance(res0)

    res1: breeze.stats.MeanAndVariance = MeanAndVariance(3.0,2.5,5)

    

    scala> breeze.stats.stddev(res0)

    res2: Double = 1.5811388300841898