Teach you how to use Matlab to draw scatter plots.

Method/Step 1, since to draw a scatter plot, naturally need some discrete data, the following we use MATLAB to generate this data, the actual application of the data we obtained is obtained from other means. The specific instructions and results are as follows: 2, first need to draw a point chart, that is, the location of each number of points drawn out, the use of the Directive is: Scatter (x,y1, ' K '), the directive is mainly used to draw a point map, the "inside of the K mark is every point in black paint, It is also possible to add some other parameters together: as shown in the following figure: 3, the following is the first step to generate data and the second step of the instructions to draw a point graph, as shown in the figure below, green is Y1 data, red is y2 data. 4, the following point string up, it is done, the use of the command is: Plotyy (x,y1,x,y2, ' plot '), the specific figure is as follows: