Draw a line from one point to ALL points
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So ive plotted a set of x and y arrays. Then i plotted a mean.
How do i draw lines only from this mean to all other points?
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Image Analyst
am 19 Mai 2013
Try this demo:
% Generate sample data
thePoints = 3*rand(20,2);
% Find the mean.
referencePoint = mean(thePoints, 1)
xMean = referencePoint(1);
yMean = referencePoint(2);
% Plot the points.
scatter(thePoints(:, 1), thePoints(:, 2), 'LineWidth', 3);
hold on;
plot(referencePoint(1), referencePoint(2),...
'ro', 'MarkerSize', 15, 'LineWidth', 3);
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);
grid on;
% Plot lines from the mean to all the other points.
for k = 1 : size(thePoints, 1)
x = thePoints(k, 1);
y = thePoints(k, 2);
line([x, xMean], [y, yMean], 'Color', 'k');
end
![](https://www.mathworks.com/matlabcentral/images/broken_image.png)
2 Kommentare
Image Analyst
am 19 Mai 2013
A for loop is fine, especially for some small amount of iterations. And if the number of points was huge, you wouldn't be doing this in the first place since all the lines would overlap and blend together making a big mess.
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