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?
采纳的回答
Image Analyst
2013-5-19
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
2 个评论
Image Analyst
2013-5-19
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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