MATLAB: How i do plot a point connecting 5 points and how i name the end point and centre point with letters

Question

how i can draw the graph and name the end points with letters?

Answer 1

Here's a solution

% your data
x = [20 25 30 35 45];
y = [40 15 10 50 30];
x0 = 30;
y0 = 30;
figure('color','white');
xlim([20 45]); ylim([10 50]);
hold on;
for ipt = 1:length(x)
    plot([x(ipt) x0],[y(ipt) y0],'color',[0 0 1]);
    myChar = char(64+ipt);
    text(x(ipt)+0.5,y(ipt)+0.75,myChar);
end
plot(x,y,'o','markerfacecolor','k','markeredgecolor','none', ...
    'markersize',4);
plot(x0,y0,'o','markerfacecolor','k','markeredgecolor','none', ...
    'markersize',4);
text(x0+0.5,y0+0.75,'O');
set(gca,'xtick',[20:2:44]);
set(gca,'ytick',[10:10:50]);
set(gca,'XMinorTick','on');
set(gca,'YMinorTick','on');
xlabel('x');
ylabel('y');