Draw a line from one point to ALL points

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?

[Azzi Abdelmalek]

Can you be more clear, and post your code.

Answer 1

[Image Analyst]

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

[Delvin]

Thanks, i was about to use the for loop but thought there might be some sneaky hidden matlab command!

[Image Analyst]

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.