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Exercise

2D Arithmetic

2D numpy arrays can perform calculations element by element, like numpy arrays.

np_baseball is coded for you; it's again a 2D numpy array with 3 columns representing height (in inches), weight (in pounds) and age (in years). baseball is available as a regular list of lists and updated is available as 2D numpy array.

Instructions

100 XP
  • You managed to get hold of the changes in height, weight and age of all baseball players. It is available as a 2D numpy array, updated. Add np_baseball and updated and print out the result.
  • You want to convert the units of height and weight to metric (meters and kilograms, respectively). As a first step, create a numpy array with three values: 0.0254, 0.453592 and 1. Name this array conversion.
  • Multiply np_baseball with conversion and print out the result.