Molti studi scientifici contengono errori di Excel

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il Post riporta un interessante articolo al proposito. Un semplice commento, non si tratta di un errore del software o del formato utilizzato ma di semplici sviste nella formattazione, è infatti molto semplice evitare questi errori prestando attenzione alla formattazione dei dati durante gli inserimenti (o le successive conversioni di formato)

Extract data from an image or a PDF

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It may happen to access a PDF file over the internet with a graph and no data available in numeric format..

this is an example from the European Parliamentary Research Service Blog:

Annual public expenditure on tertiary education as a % of GDP, 2008

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Divertissement mathématique

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One day, driving for some hundreds Km and for many hours, I let my mind going around the vast fields of knowledge and it came back with an interesting demonstration of a well known mathematical formula.

As you know the explicit formulas to solve the equations of any degree becomes immediately complex with the increasing of the equations degree and, more than that, it is possible to provide an explicit formula only for equations of 2°, 3° and 4° degree. This thing, and the difficulty of “deriving” them, have been creating in me some un-comfort since my days in high school.

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