It will take time to read all the numbers, then compare sales of each year with the preceding year or some base year. Having raw data makes it impossible to understand the significance of data.įor example a table showing sales for a particular product of last 10 years is provided. Numbers needs to be formatted before any meaningful inferences can be drawn. Human mind is unable to retain and comprehend much of factual data especially when it consist of numbers. Information hidden in numbers is clearly reflected and understood using charts and graphs. It becomes easy to understand tables when they are represented pictorially by pie charts, line & bar graphs. This is where data visualization comes into play. Understanding digits is difficult, interpretation of countless number is difficult unless it is presented in a meaningful way. What makes data visualization extremely effective and useful?
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