How to calculate distance between two ginput?

hai friends i have to calculate distance between two ginput points and also how to calculate angle between 4 ginput.

how to calculate its length?

And how to calculate angle for this ?

Answer 1

[Birdman]

%%distance  
[x,y]=ginput(2)
  len=sqrt((y(2)-y(1))^2+(x(2)-x(1))^2)

%%angle
[x,y]=ginput(4);angle=zeros(1,floor(length(x)/2));
for i=1:floor(length(x)/2)
    angle(i)=atan((y(i+2)-y(i+1))/(x(i+2)-x(i+1)));
end

[VALARMATHY K]

Thank you please tell me how to measure its length in centimetre

[Birdman]

Use this:

m=input('Enter upper x limit in any unit(ex. centimeters)\n');
n=input('Enter upper y limit in any unit(ex. centimeters)\n');
c=line;c.Parent.XLimMode='Manual';c.Parent.YLimMode='Manual';c.Parent.XLim=[0 m];c.Parent.YLim=[0 n];
[x,y]=ginput(2);
len=sqrt((y(2)-y(1))^2+(x(2)-x(1))^2);
c=plot(x,y)

[VALARMATHY K]

Thank you..., but i am not getting value in centimetre, but your first answer helps me.

[Birdman]

You should not expect to get an answer in centimeter because you can not define any unit for the variable. You just assume that it is centimeter.