how to draw a tangent line between two point (highest points) and draw a perpendicular drop line from mid of the tangent line?

Please see attached image.

some ideas and suggestions as I am beginner in matlab.

[Dyuman Joshi]

"some ideas and suggestions as I am beginner in matlab."

How would you do this using pen and paper? Follow the same method for writing a code as well.

If you need help from the forum, show the code you have attempted to solve the problem and ask a specific question where you are having problem.

Answer 1

[Image Analyst]

Here's a start. See if you can finish it:

x1 = 50;
x2 = 62;
y1 = 60;
y2 = 64;
plot([x1, x2], [y1, y2], 'k.-', 'MarkerSize', 50, 'LineWidth', 2)
grid on;
xlabel('x');
ylabel('y');
axis equal
xMiddle = (x1 + x2) / 2

xMiddle = 56

yMiddle = (y1 + y2) / 2

yMiddle = 62

hold on;
plot(xMiddle, yMiddle, 'r.', 'MarkerSize', 50)
% Get slope
slope = (y2-y1) / (x2 - x1)

slope = 0.3333

% Get perpendicular slope
perpSlope = -1 / slope

perpSlope = -3

% Draw line to a third point at x = 63;
% y - yp = slope * (x - xp)
x3 = 63;
y3 = perpSlope * (x2 - xMiddle) + yMiddle

y3 = 44

plot([xMiddle, x3], [yMiddle, y3], 'r.-', 'MarkerSize', 50, 'LineWidth', 2)