How do I get the angle between three points input by ginput() in appdesigner?

[x, y] = ginput(3);

app.UIFigure.HandleVisibility = fhv;

x = round(x);

y = round(y);

I received the input with ginput(), but I don't know how to convert it to angle.

(R2022b)

Answer 1

[David Hill]

z=[x,y];
d=diff(z);
Angle=acos(dot(-d(1,:),d(2,:))/norm(d(1,:))/norm(d(2,:)));

[채호 박]

Thank you so much. I just have a few questions.

If I receive input from ginput(6) and the angle between the first three points is angle1, then the angle between the third points is angle2

z=[x,y];

d=diff(z);

app.angle1=acos(dot(-d(1,:),d(2,:))/norm(d(1,:))/norm(d(2,:)));

app.angle2=acos(dot(-d(4,:),d(5,:))/norm(d(4,:))/norm(d(5,:)));

Is it right?

+) If I use angle1, 'Use app.angle1 to reference app properties' appears. Is this correct?

properties (Access = private)

angle1

end