Bar Graph (Definition, Types)

A bar chart, also known as a bar graph, is a chart that plots data using rectangular bars or columns (called bins) that represent the total number of observations in a group. Rectangular bars with heights or lengths proportional to the values they represent are used to display categorical data. Bar graphs can be shown with vertical sections, level bars, similar bars (different bars to show an examination between values), or stacked (bars containing numerous sorts of data). In statistics, bar graphs are one of the data handling methods. Statistics are the compilation, presentation, study, arrangement, and interpretation of data observations.

A bar graph shows examinations among discrete classifications. One pivot of the graph shows the particular classes being looked at, and the other hub addresses a deliberate worth. It doesn’t make any difference which pivot is which, yet it will figure out what reference diagram is appeared. The bars would be vertically oriented if the descriptions are on the horizontal axis, and horizontally oriented if the values are on the horizontal axis. In financial analysis, bar graphs are widely used to view data. A stock volume chart is a type of vertical bar graph that is widely used. A histogram is an illustration of a reference chart utilized in measurable examination that portrays a likelihood conveyance in some information or test.

Bar graphs or bar charts are pictorial representations of clustered data in the form of vertical or horizontal rectangular bars, where the lengths of the bars are equal to the measure of data. For comparative purposes, the columns may contain several named variables (or only one), and they can be grouped together (or not). The bars drawn are of uniform width, and the variable amount is addressed on one of the axes. Additionally, the proportion of the variable is portrayed on different axes. Some bar graphs have several bars clustered together to display the values of several calculated variables.

Example of Bar Graph

The heights or lengths of the bars represent the variable’s value, and these graphs may also be used to compare two or more quantities. Bar charts can be used to display frequency distribution tables, making calculations and interpreting data easier. The motivation behind a structured presentation is to pass on social data rapidly as the bars show the amount for a specific class. The vertical hub of the visual chart is known as the y-axis, while the lower part of a reference diagram is known as the x-axis. The length of the bars/columns defines the value as defined on the y-axis when interpreting a bar graph.

The Exports and Imports of Scotland to and from Various Parts for One Year from Christmas 1780 to Christmas 1781 graph from William Playfair’s The Commercial and Political Atlas is widely regarded as the first bar chart in history. Diagrams of the velocity of a continuously accelerating object against time reported around 300 years ago in The Latitude of Forms (attributed to Jacobus de Sancto Martino or, possibly, Nicole Oresme) can be translated as “proto bar charts.”

Bar graphs are often used in trading to represent trading volume and appear in a panel underneath a security’s price chart. The three major attributes of bar graphs are:

  • The bar graph makes it simple to compare various sets of data among different classes.
  • It depicts the relationship using two axes, with distinct values on one axis and categories on the other.
  • The graph shows the major changes in data over time.

Bar graphs come in a variety of shapes and sizes. It is not always possible to use them interchangeably. A different method of comparison would work better for each type. The types of bar charts are as follows:

  • Vertical bar chart: Vertical bar graphs are created when clustered data is displayed vertically in a graph or chart with the aid of bars, where the bars reflect the data measure. The data is displayed on the graph’s y-axis, with the height of the bars indicating the values.
  • Horizontal bar chart: Horizontal bar graphs are created when clustered data is displayed horizontally in a chart with the aid of bars, with the bars indicating the data measure. The data is represented on the graph’s x-axis, with the length of the bars indicating the values.

Despite the fact that the chart can be plotted utilizing on a level plane or vertically, the most regular sort of visual diagram utilized is the vertical structured presentation. The direction of the x-axis and y-axis are changed relying upon the sort of vertical and even bar graph. Apart from the vertical and horizontal bar graph, the two different types of bar charts are:

  • Grouped Bar Graph: Clustered bar graphs, also known as grouped bar graphs, display discrete values for several items in the same category. A bar graph could show the number of male and female individuals with a particular trait at different ages. The total number of instances could be grouped into a single bar. Then again, the examples could stay isolated by gender; one bar for every male case and one bar for all females occasions would be set one next to the other for each age or age bunch.
  • Stacked Bar Graph: Stacked bar graphs, also known as composite bar graphs, divide a sum into sections. These components are usually distinguished by the use of different colors for each section. In the model over, the total of cases for the two guys and females might be consolidated into one bar however the bar might be separated into various segments addressed by various shadings. To distinguish what the different sections of the bar are displaying, stacked bars need a legend or precise labeling.

For each independent variable, a range bar graph represents a range of data. Temperature or price ranges are two examples of typical data sets for range graphs. When comparing two or more values, or values over time, bar graphs are best. Information is shown either evenly or vertically. Single reference diagrams are utilized to pass on discrete upsides of a thing inside a class. Some of the important properties of a bar graph are as follows:

  • All the bars should have a common base.
  • Each column in the bar graph should have equal width.
  • The height of the bar should correspond to the data value.
  • The distance between each bar should be the same.

A volume chart is used in technical analysis to demonstrate how much volume was traded on a given day. The x-axis represents days, and a bar extending up from that day represents the amount measured on the y-axis. Bar charts have a discrete area of classifications, and are typically scaled so all the information can fit on the diagram. When there is no regular requesting of the classes being thought about, bars on the outline might be organized in any request. Bar charts masterminded from most noteworthy to least frequency are called Pareto graphs.

Bars will still be shown when a graph has a well-defined zero point and the data set has both positive and negative values in relation to this point. Positive values (check the scale) are represented by bars above the zero line, while negative values are represented by bars below the zero line. Downright information is a gathering of information into discrete gatherings, like a long time of the year, age bunch, shoe sizes, and creatures. These classifications are typically subjective. In a section bar outline, the classifications show up along the level hub; the stature of the bar relates to the worth of every classification.

The bar graph is used to compare objects over time between various categories. It’s a tool for determining how things have changed over time. When the changes are more significant, a bar graph is the best way to visualize the data. Bar graphs can also make data seem more interesting when it really isn’t. Verify the source of the data, and make sure it comes from a large enough pool or sample, as with all data.

Information Sources:

  4. wikipedia