Explain and discuss the different types of graphs.
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What is a Graph?
A graph is a pictorial representation of data in an organized manner. Graphs are usually formed from various data points, which represent the relationship between two or more things.
A picture says a thousand words, they say. A graph, on the other hand, not only says a thousand words but also tells a million stories.
Each point, stroke, color, or shape on a graph has a different meaning that helps in interpreting a graph. They are of different types and vary in structure, with some having just points, others have points joined together by lines, and so on.
Graphs and Charts - What is the Difference?
Although sometimes used interchangeably, it is important to note that there is a difference between graphs and charts. Summarily, we can say that all graphs are charts but not all charts are graphs.
A graph is a mathematical diagram that depicts the relationship between two or more sets of numerical data over a period of time. Basic data is mainly 2-dimensional with a focus on raw data represented through lines, curves, etc.
Charts, on the other hand, is a representation of datasets with the intent of making the user understand the information in a better manner. Graphs are a good example of charts used for data visualization.
Types of Graphs and Charts
There are various types of graphs and charts used in data visualization. However, in this article, we'll be covering the top 11 types that are used to visualize business data.
Bar Chart/Graph
A bar chart is a graph represented by spaced rectangular bars that describe the data points in a set of data. It is usually used to plot discrete and categorical data.
The horizontal axis of the chart represents categorical data while the vertical axis of the chart defines discrete data. Although the rectangular bars in a bar chart are mostly placed vertically, they can also be horizontal.
bar chart or bar graph
A Bar Chart
For horizontally placed rectangular bars, the categorical data is defined on the vertical axis while the horizontal axis defines the discrete data.
Types of Bar Chart
Grouped Bar Chart
Grouped bar charts are used when the datasets have subgroups that need to be visualized on the graph. Each subgroup is usually differentiated from the other by shading them with distinct colors.
Stacked Bar Chart
The stacked bar graphs are also used to show subgroups in a dataset. But in this case, the rectangular bars defining each group are stacked on top of each other.
Segmented Bar Chart
This is the type of stacked bar chart where each stacked bar shows the percentage of its discrete value from the total value. The total percentage is 100%
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