Bar chart

The bar graph, called for very slender columns and bar chart is a graph ( with meaningless width rectangles ) the frequency distribution of a discrete ( random ) illustrated by the x- axis is perpendicular, non-contiguous columns variables. The bar graph is particularly suitable to illustrate a few versions ( up to 15 ). For more categories the clarity suffers and it is preferable to line charts.

Bar charts were first developed by the camera lists August Friedrich Wilhelm Crome.

Properties

The bar graph is a height proportional representation form of a frequency distribution, since the height of a column is proportional to the frequency of the corresponding characteristic value. Do all columns the same width, that is, is the column width on all characteristic values ​​constant, the Höhenproportionalität also implies Flächenproportionalität.

In contrast to the line representation, a column on visually in all the values ​​from the origin to the final value. Because of this, columns are not suitable for every application. Depending on the value can grow the column up or down.

Special shapes

Stacked Column Chart

Stacked column charts, also called stack diagrams represent relative frequencies in a rectangular column represents the respective frequencies are accordingly represented as surfaces. The individual values ​​are arranged one above the other and the rectangular column represents the total value. Total values ​​are thus more comparable. However, the stack diagram is less well suited to read changes in the shares shown.

Clustered Column Chart

The clustered bar chart is the values ​​of several categories starting next to each other. The different variables are thus directly comparable. The aggregated data can be, however, difficult to read and compared in this chart type.

Overlapped bar graph

In a overlapping bar graph the columns of a respective characteristic are shown overlapped. This presentation option is often used for multiple time series. In this regard, there is the latest series in the foreground and, accordingly, older time series are partially obscured.

Bar chart

The bar chart is very similar to the bar chart. The only difference is in the type of visualization. Because a bar chart is turned 90 ° bar graph, ie that instead of vertical columns horizontal bars are displayed. Especially good bar graphs are useful for representing rankings.

Other special shapes are the Pareto and the waterfall chart.