How do I add a line, or a linear regression from cftool, to a scatter graph?
2 次查看(过去 30 天)
显示 更早的评论
Hi, I have a scatter graph that consists multiple arrays of information. Also I have a linear regression,which I generated its code, but when I launch the program it gives me 2 graphs: the scatter one, and the regression one in 2 different outputs. Of course I used the hold ons, both for the scatter graph (which works well) and for the regression graph, but it doesn't add it right. How do I add it together? That's how it looks:
Thanks very much in advance!
0 个评论
回答(1 个)
sloppydisk
2018-5-3
You could use copyobj:
% data
n = 200;
x = 1:n;
y = x+25*rand(1, n);
figure(1)
% handle to first axis
ax1 = gca;
scatter(y, x)
b = x'\y';
figure(2)
% handle to second plot
h2 = plot(b*x, x);
% copy line object from second plot to axis from first plot
copyobj(h2, ax1);
4 个评论
sloppydisk
2018-5-4
You can just do another plot command with new x-values. For example if you want the line from zero to five:
x = [0 5]; y = -88.69*x +180.5; plot(x, y)
Though I am sure you could have figured this out without me by reading
doc plot
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!