How to plot rectangles using variables
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I'm trying to plot several rectangles with data from an array, and i can't quite figure out how to plot this way
The code i've been trying:
T = testarray;
x1 = T(1:216,1);
y1 = T(1:216,2);
w1 = T(1:216,3);
h1 = T(1:216,4);
x = table2array(x1);
y = table2array(y1);
w = table2array(w1);
h = table2array(h1);
rectangle('Position',[x(1:216,1) y(1:216,1) w(1:216,1) h(1:216,1)])
axis([-1 2 -1 2])
Any idea what i'm doing wrong? I keep getting the error "Error using rectangle
Value must be a 4 element vector"
采纳的回答
Are you trying to plot 216 rectangle with that one line? If you look at the documentation, you will see that you cannot do that. It is expecting a single 4-element vector, not an array.
You need to loop over your arrays. (If that is, indeed, what you are trying to do.) Here is how you can do that. I just used 6 rectangles, and pretend data.
N = 6;
testarray = array2table(rand(N,4));
T = testarray;
x1 = T(1:N,1);
y1 = T(1:N,2);
w1 = T(1:N,3);
h1 = T(1:N,4);
x = table2array(x1);
y = table2array(y1);
w = table2array(w1);
h = table2array(h1);
figure
hold on
for nr = 1:N
rectangle('Position',[x(nr) y(nr) w(nr) h(nr)])
axis([-1 2 -1 2])
end
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