Diagrams and charts are visual representations of information. They are useful for documenting facts, drawing plans, and capturing ideas and enhance communication, learning, and productivity.
These visuals show relationships or connections between entities. Some show a directional flow of steps or information, as we see in flowcharts and network diagrams. Others display hierarchies, as in organizational charts, genograms, and cause-and-effect diagrams. A Venn diagram is a chart-based diagram that illustrates the overlap among sets of data.
These diagrams present statistical data graphically. The most common among these are the bar graph, line graph, histogram, and pie chart. An advantage of using graphs is that they can show changes over time or a comparison of numbers much more clearly than a data table can do.
These types of diagrams show the elements in a system. Many schematic diagrams use standard symbol sets. They may be representational and drawn to scale, such as in a floor plan, where they must convey precise measurements and placement of elements. Some schematics are more abstract, such as a circuit diagram, in which the drawing shows the layout of a system, but not how it will actually appear in the physical circuit.
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