how to subplot data from two matrix using for loop?

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Hydro
Hydro 2017-8-17
编辑： per isakson 2017-8-18
I would like to use for loop to plot data from matrix A together with the corresponding column of matrix B using sub plot function. Below is my initial code. The problem is that I don't see any thing on the plots. Any help/suggestions would be appreciated.
X=1:1:100;
A=randi([1 10],100,3);
B=A+2;
hold on
for i=1:3
subplot(3,1,i)
plot(X,A(i));
plot(X,B(i));
end

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per isakson
per isakson 2017-8-18
编辑：per isakson 2017-8-18
Problems with your code
  • A(i) outputs a scalar. You want A(:,i), which outputs the i:th column
  • your code displayed a dot, which was difficult to see
Try
X=1:1:100;
A=randi([1 10],100,3);
B=A+2;
%
for i=1:3
subplot(3,1,i)
plot(X,A(:,i));
hold on
plot(X,B(:,i));
hold off
end
which creates

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