Gnuplot is a command-line interactive drawing tool. Users gradually establish or modify the drawing environment by inputting commands, and describe data or functions with graphics. Advantages are fast drawing speed, refreshing painting style, open source free software and quite professional image quality. Disadvantages: Need to write code.

2、Matplotlib

Matplotlib is a standard drawing package of famous Python, and the name of its drawing function is basically similar to Matlab. The advantages are exquisite curves, free open source software, and support for Latex formula insertion, which can be done in many cases with only one or several lines of code. The disadvantage is that Python programming foundation is needed.

3、visio

Microsoft Visio is a flowchart software running under Windows operating system, and now it is a part of Microsoft Office software. Visio can make all kinds of charts, and use Visio's powerful drawing function to draw maps, corporate logos and so on. The most important thing is to draw flowcharts and schematic diagrams.

4. Origin

Origin is a simple and easy-to-learn drawing software with flexible operation and complete functions. It can not only meet the drawing needs of ordinary users, but also meet the needs of advanced users for data analysis and function fitting. The disadvantage is that the operating system is not very friendly, easy to crash, and only supports Windows system.

5、Tecplot

Tecplot can realize from simple two-dimensional curve and surface diagram to complex three-dimensional dynamic diagram. Its characteristic is that it can quickly convert a large amount of data into easy-to-understand pictures, such as contour lines, vector diagrams, grid diagrams, section diagrams, streamline diagrams and so on.