It seems that PLOT command is being bypass and not being execute..

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Nimisha 2016-5-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/284216-it-seems-that-plot-command-is-being-bypass-and-not-being-execute

编辑： Nimisha 2016-5-16

 delete(instrfindall)
 clear all;clc
 s = serial('COM6');
 fopen(s) 
 A1 = 0; B1 = 0;
 for i = 1:1000
 P = fscanf(s,'%f')
 if P == 1
   A1 = A1+1; B1 = B1;
   elseif P == 2
   A1 = A1-1; B1 = B1;
 elseif P == 3
   A1 = A1; B1 = B1+1;
 elseif P == 4
    A1 = A1; B1 = B1-1; 
 else
 end
 plot(A1,B1,'*') 
 hold on
 end
 fclose(s) 
 delete(instrfindall)

I have written this code. I am receiving serially data very wel . But plot command is not being executed. As well * is not moving accordingly. Please correct me.

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采纳的回答

Image Analyst 2016-5-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/284216-it-seems-that-plot-command-is-being-bypass-and-not-being-execute#answer_222130

在 MATLAB Online 中打开

A1 and B1 are just points, not vectors or arrays. So you will just see a single point, not a curve. To see it better, try this:

plot(A1, B1, 'b*', 'LineWidth', 2, 'MarkerSize', 30);
grid on;

If you want more points, then you need to make A1 and B1 vectors, or else put "hold on" and call plot over and over again with new values of A1 and B1.