The size of a pie chart wouldn't make any difference.įrom the same data as above, resizing a pie chart would not reveal anymore data, and the space taken to resize just to make it clear would only be a waste.Ĭompared to the bar charts above, the smaller chart is already showing a clear difference between the columns, but when enlarged you'd get a more clearer picture of the differences.įrom the 2009 BBC News European Election Results above, if we wanted to see how would the Conservative party fare when say the Labour party were to join forces with the Liberal Democrats, its very hard to tell using the pie chart above. Now if we compare to the bar chart above, it is so much easier to see the difference between the items.Ģ. As the purpose of the chart is to tell the differences between each party, using a pie chart proves to difficult in achieving this.
It is also quite hard to tell the difference between the next two parties, Green and BNP. Pie charts made it difficult to compare individual values.Īs this example taken from the 2009 BBC News European Election Results suggests, even though it is reasonably clear that the Conservative Party has the biggest chunk of the vote, it is definitely hard to see the difference between the next three parties, UKIP, Labour and the Liberal Democrats. The main reason when we visualize information in charts or graphs is to make it easier to interpret and compare information within, however, using Pie Charts have proven the opposite.
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