I have studied bar chart, fan chart and line chart. Here is a brief introduction. 1. A bar chart represents a number in unit length (for example, 1 cm). According to the number, draw straight lines with corresponding proportional length and arrange them in a certain order. This statistical chart is called a bar chart. Bar charts can clearly show the quantities of various quantities. Bar chart is the most commonly used graph in statistical chart data analysis. According to the different analysis functions, it can be divided into bar chart comparison chart and bar chart structure chart. Features of bar graph:? (1) enables people to see the size of each data at a glance. (2) It is easy to compare the differences between the data. [Edit this paragraph] 2. A sector chart shows the whole of things by the area of a circle, and a sector chart shows the percentage of the whole is called a sector chart. It is also called a percentage comparison chart. The fan-shaped statistical chart can clearly reflect the quantitative relationship between parts, parts and the whole. Characteristics of fan-shaped statistical chart:? (1) Use a sector to indicate the percentage of parts in the total. (2) It is easy to display the size of each group of data relative to the total. [Edit this paragraph] 3. A broken-line statistical chart is a statistical chart that shows the increase or decrease of statistics by the rise or fall of broken lines, which is called a broken-line statistical chart. Compared with bar chart, broken line chart can not only represent quantity, but also reflect the development and change of the same thing in different periods. Line charts are widely used in life. Although accurate data is not given directly, it can be used quickly as long as you master certain skills and skillfully use the "coordinate method". Features of broken-line statistical chart: (1) can show the changing trend of data and reflect the changing situation of things. [Edit this paragraph] 4. Network statistical chart? The characteristic of the network statistical chart is that there are only some letters in this kind of statistical chart, and the meaning represented by the letters is outside the topic. Before you answer the question, you must find out what these letters mean. In the specific answering process, you can easily get the answer without letters. 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. [Edit this paragraph] V. The characteristics of stem and leaf statistics are: this kind of statistics can only handle two digits.