How to draw fan statistics?

The fan-shaped statistical chart can clearly reflect the quantitative relationship among parts, parts and whole.

By using fan-shaped areas to represent the percentage of each part in the total, the size of each group of data relative to the total can be easily displayed.

The relationship between the sector area and its corresponding central angle is as follows:

The larger the sector area, the greater the degree of the central angle;

The smaller the sector area, the smaller the degree of the central angle.

The relationship between the angle and percentage of the central angle of the sector is:

Extended data:

The main purpose of statistical chart is: to show the contrast between phenomena; Expose the whole structure; Check the implementation of the plan; Reveal the interdependence between phenomena and reflect the distribution of the whole unit; Explain the spatial distribution of phenomena.

Generally, rectangular coordinate system is adopted. The abscissa is used to represent the group or independent variable x of things, and the ordinate is often used to represent the number of times things appear or the dependent variable y; Or use angular coordinates (such as circular map), geographical coordinates (such as topographic map) and so on.

According to the digital nature of the scale, there are real number diagram, cumulative number diagram, percentage diagram, logarithmic diagram, exponential diagram and so on. Its structure includes drawing name, title (title in the drawing), drawing ruler (coordinate unit) and various drawing lines (baseline, contour line, guide line, etc.). ), drawing notes (illustration, data source, etc. ), etc.