如何读取数据textread，例如通过textread( x_inlet.txt )我们可以把文件x_inlet.txt中的数据存储到数组x中，且x的维数和大小会自动与文件x_inlet.txt的相匹配。

如何画三维曲面图contour，例如 contour(x,y,z)，其中xy分别为n,m个元素的一维数组时，z必须为n*m的二维数组。

-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.