Tuesday, March 9, 2010

A championship graph

Expansion.com a comparative graphic stranger published Tuesday (thousand thanks to Luis for the linkage) between the economic value of the different selections of soccer that will go to the world cup (in fact, only the Spaniard compares, two to two, with each of the others). Apparently, a counsel has thought how much would find it hard to record 25 players that more minutes have played with every selection in the classification phase and it has done with it an estimation of value of every selection. It looks like a thing reasonably serious, and gives like turned out that the Spanish selection would be the most expensive.
But the graph has neither feet nor head. And above they it will have dedicated to doing a heap of effort. Let's see. Most of the space occupies a drawing of a football ground, with players dressed in the uniform of two compared selections (one is fixed, Spain, and other one is changing after the mouse slides on the name of other selections). Information: zero (or almost). The comparison is done in two parts. On the one hand, two green bars, to the sides, are related to the position of the selection in the classification FIFA: Spain, nº 1, has the full green bar even above, other selections, more empty bars as his position. The comparison between the values (that it is supposed that it is the novel thing) is done by two red circles, which
  • they do not fit in the field of the drawing (that of Spain "leaves" for the right),
  • they appear in the fund, way covered by the field, and for the names of the countries,
  • they try to represent, apparently, the estimated value of the selections, but they do not keep the proportion between the values for his areas, but (seemingly) for his radioes (stupid error that we have already criticized here often).
This one the comparison entity is, for example, Spain and France:

And this is the comparison between Spain and Chile:

If the red circle was representing the value of the selection it should be almost exactly 7 times smaller than that of Spain. Instead of that, if it is proportional to the radio (I suppose it, but I have not verified it), the small circle will be some 49 times smaller than the big circle (that anyhow does not turn out to be entire!!!).
Really a spectacular example from how concealing information across the graphs. With how simple a bar chart had been, with little flags or colors of uniform, arranging the countries for ranking FIFA, and with the proportional bars to the dear value. There would be seen perfectly, of only one glance, both the differences of value between all the taking part teams (and not only compared to Spain), and the relation (or absence of her) between the value of the selections and the ranking FIFA. A case for the anthologies of how much damage can do the computer graphics in bad hands.

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