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Also known as Bar Graph or Column Graph.
A Bar Chart uses either horizontal or vertical bars (column chart) to show discrete, numerical comparisons across categories. One axis of the chart shows the specific categories being compared and the other axis represents a discrete value scale.
Bar Charts are distinguished from Histograms, as they do not display continuous developments over an interval. Instead, Bar Chart's discrete data is categorical and therefore answers the question of "how many?" in each category.
More Bar Chart variations in this blog post.
Tools to Generate Visualisation
Google Charts (HTML5)
Python Graph Gallery (Python: matplotlib + seaborn)
R Graph Gallery (R/ggplot2)
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