Scientific research drawing is an indispensable part of scientific research work, which can help researchers better understand and interpret data. The following are some skills that need to be mastered in scientific research drawing:

1. Select the appropriate chart type: select the most appropriate chart type according to the characteristics of the data and the research purpose. Common chart types are histogram, line chart, pie chart and scatter chart.

2. Design simple and clear charts: avoid using too many colors and lines to avoid distracting readers. At the same time, make sure that the text in the chart is clear and easy to read, and the font size is moderate.

3. Labeling axis and unit: Add clear labels for axis and indicate unit. This helps readers to better understand the data in the chart.

4. Add Legend: If there are multiple data sets in the chart, add a legend to distinguish them. Legend should be placed in the corner or bottom of the chart, so that readers can quickly find the information they need.

5. Use data processing software: master the skills of using data processing software (such as Excel, SPSS, R, etc.). ) can help you draw charts more efficiently.

6. Pay attention to details: When drawing a chart, pay attention to checking the accuracy and consistency of the data. In addition, ensure that graphic elements such as lines, columns, etc. ) neatly arranged.

7. Learn from excellent works: By reading excellent scientific research papers and reports, learn from other people's chart design and expression. This will help to improve your painting skills and aesthetic level.