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

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Nimisha
Nimisha on 14 May 2016
Edited: Nimisha on 16 May 2016
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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Accepted Answer

Image Analyst
Image Analyst on 14 May 2016
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.
  6 Comments
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Nimisha
Nimisha on 16 May 2016
Edited: Nimisha on 16 May 2016
Thanks.
drawnow
Commmand works well to show and update plot.

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More Answers (1)

Walter Roberson
Walter Roberson on 14 May 2016
After the
hold on
add
set(gca, 'xlimmode', 'auto', 'ylimmode', 'auto')
  1 Comment
Nimisha
Nimisha on 15 May 2016
Ya. Thanks I modified my code with this command.
But my actual problem is mentioned above.

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