Haskell Cookbook

How to do it...

1. Create a new project working-with-type-family with a simple stack template:

 stack new working-with-type-family simple

2. Add a dependency on vector-space library in the build-depends sub-section of executable section:

 executable working-with-type-family
   hs-source-dirs:      src
   main-is:             Main.hs
   default-language:    Haskell2010
   build-depends:       base >= 4.7 && < 5
                      , vector-space

3. Open src/Main.hs. We will be adding our source here.
4. Define the module Main, and import Data.VectorSpace:

 module Main where

 import Data.VectorSpace

5. Define vectors in three dimensions by using a tuple:

 diagonal :: (Double, Double, Double)
 diagonal = (1, 1, 1)

 xaxis :: (Double, Double, Double)
 xaxis = (1, 0, 0)

6. Scale the diagonal vector, and take ...