4 ms·

Yes they are.

• davebees 14y ago
  For comparing two portions they’re okay. For larger data sets it can be difficult to compare the sectors: http://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Piecharts.svg/689px-Piecharts.svg.png http://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Pie...
  • stdbrouw 14y ago
    Exactly, they're great for binary groups: <facet> yes/no
• flog 14y ago
  Proof: http://chart.apis.google.com/chart?chtt=Pie+charts+are+great+at+comparing+proportions+within+a+single+data+set&chts=000000,14&chs=600x300&chf=bg,s,ffffff&cht=p&chd=t:50.00,50.00&chl=Yes+they+are|No+theyre+not&chco=990000,0000ff http://chart.apis.google.com/chart?chtt=Pie+charts+are+great...
• kmfrk 14y ago
  Tufte wept.