本文借鉴了数学建模清风老师的课件与思路,可以点击查看链接查看清风老师视频讲解：清风数学建模：https://www.bilibili.com/video/BV1DW411s7wi

 前言

 一、饼图

1.1 Regular Pie Chart

 要求：untitled,Monochrome for coloring（方便打印,有区分度,Available in black and white）,Label the data and zoom in appropriately,Put the legend to the right and zoom in appropriately,边框为无线条.

分析：The highest sales in the fourth quarter,Lowest in the third quarter.

 1.2 类别太多

 Category too much in the histogram.

1.3 too few categories

 Don't draw when there are too few categories,direct text description,Unless it can be drawn as a picture of World of Warcraft or the problem of raising dragons,But the national competition doesn't like fancy pictures either..

1.4 Category is not complete

 Pie chart looks like a complete set,But the data is not a complete set,There are other brands that don't show.The data above is the complete set,Can be used to draw pie charts.

1.5 Sort first then draw pie chart

 Pie chart before sorting.

 After sorting the pie chart,Is it more layered?.

1.6 复合饼图

 See the video for details25：40.

分析：The best seller is Huawei,The second good is a apple,The other four categories account for the overall8%,The top two selling brands accounted for the total50%.

1.7 Pie Chart Summary

 二、柱状图

2.1 Histogram with only one column of data

 2.2 Histogram with multiple columns of data

 2.3 Three types of bar chart

 At this time, ordinary histograms are generally not used.,Use a Stacked Column Chart or a Percent Stacked Column Chart.

图形意义：Compare the sales volume of different brands in each quarter.

2.4 Column chart switching between rows and columns

图形意义： Compare the sales volume of various brands in different quarters.

The meaning of analysis after switching ranks is different.

2.5 柱状图总结

三、条形图（bar chart sideways）

3.1 regular bar chart

3.2 TopsisDrawing of final score bar graph

 3.3 双向条形图

 详见视频21：40.

3.4 Histogram visualization of regression results

 For the specific visualization process, please refer to the video32：0.

 3.5 Bar Chart Summary

 四、直方图

4.1 频数分布直方图

 See the video for changing the number of columns5：20.

 4.2 The effect of group distance on the histogram

  4.3 频率分布直方图

 Plot frequency histogram see video12：00.

4.4 直方图总结

 五、折线图（时间序列变量）

5.1 Comparison of line and column charts

 5.2 Very long time series diagram（折线图）

5.3 Two-axis line chart

See the video for drawing a two-coordinate line chart15：20.

5.4 Line chart at the top of a column chart

 See the video for drawing a line chart at the top of a column chart21：00.

5.5 Line chart summary

 六、散点图（描述相关性）

 See the video for scatterplots with logos4：30.

 七、箱线图（Comparing two qualitative variables）

7.1 Comparison of histogram and boxplot 

 The histogram can't tell the difference,The boxplot can be a good way to show the difference between the two.

7.2 Boxplots for multiple categories

7.2 Boxplot summary

八、其他

饼图、柱状图、Line chart is sorted first and then plotted,unless it is time series data.