Grid lines add horizontal and/or vertical lines to your graph that aid in measuring graph values. By default, these grid lines use the color assigned to the "automatic" selection feature, which is ...
People check out the newly opened Second Avenue Subway 86th Street station in New York on Jan. 1 in New York City. (AP Photo/Craig Ruttle) This is your first of three free stories this month. Become a ...
Each metro line usually has its own color on the map. For obvious reasons, these colors should be maximally different. Suppose a new metro line is built. We now explain a strategy to choose the color ...
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