Introduction - If you have any usage issues, please Google them yourself
How to read the data textread, for example, through textread (x_inlet.txt) we can store the data in the file x_inlet.txt into the array x, and the dimension and size of x will automatically match the file x_inlet.txt.
How to draw a three-dimensional surface contour, such as contour (x, y, z), where xy is a one-dimensional array of n and m elements, z must be a two-dimensional array of n* m.