Combining two plots and adding color to points

matrix=load('Data');
x = matrix(:,1);
y = matrix(:,2);
fprintf('The maximum distance between two points is %3.2f units.\n',hypot((max(x)-min(x)), (max(y)-min(y))))
plot([max(x),max(y)],[min(x),min(y)])
scatter(x,y)
title('Maximum Distace Achieved')
xlabel('X Values')
ylabel('Y Values')

I'm having two problems with this code: the first is that I somehow need to combine a plot with a scatterplot and the second is that the line in the plot needs to be red while all other points need to be blue. I would try to work with the colors myself but all explanations I've looked up on how to do color for a plot have been rather vague. So if you could help I would greatly appreciate it.

Answer 1

[Image Analyst]

Get rid of scatter and have two calls to plot

% Plot red lines between the two most separated points.
plot(plot([max(x),max(y)],[min(x),min(y)]), 'r-', 'LineWidth', 2); 
hold on
% Plot blue stars at the points.
plot(x, y, 'b*', 'MarkerSize', 10); 
grid on;