---
data_dictionary:
  samara.txt
  
source: >
  This dataset is part of the Austrasian Data and
  Story Library (OZDASL). Please cite this data as
  Smyth, GK (2011). Australasian Data and Story 
  Library (OzDASL). http://www.statsci.org/data.
  The data comes originally from Ryan, B.F., 
  Joiner, B.L., and Rogosa, D. (1994). Minitab 
  Handbook 3rd edition. Duxbury Press.

description: >
  From the Ryan et al article: "In autumn, small
  winged fruit called samara fall off maple trees,
  spinning as they go. A forest scientist studied
  the relationship between how fast they fell and
  their "disk loading" (a quantity based on their
  size and weight). The samara disk loading is 
  related to the aerodynamics of helicopters."
  
download_url:
  text-format: https://gksmyth.github.io/ozdasl/general/samara.txt
  additional-information: https://gksmyth.github.io/ozdasl/general/samara.html

copyright:
  There is no information about the copyright for this
  dataset. You should, however, be able to use this
  data for individual educational purposes under the
  Fair Use guidelines of U.S. copyright law.

format: 
  tab-delimited

varnames: 
  first row of data
  
missing_value_code: 
  NA

size:
  rows: 36
  columns: 3

vars:
  Tree:
    label: Numeric id for individual tree
    scale: nominal
    range: 1 through 3
  
  Loading:
    label: Disk loading
    scale: ratio
    range: positive real
    
  Velocity:
    label: Fall velocity
    unit: unknown
---