Thread Subject:

perpendicular line

Hi,

How can I draw a perpendicular line from the mid-point of another line?

Appreciate your help,

Thanks and regards,
KSI

KSI,
You can adapt the following to your specific needs

x = rand(1,2);
y = rand(1,2);
line(x,y)
% Slope of current line
m = (diff(y)/diff(x));
% Slope of new line
minv = -1/m;
line([mean(x) mean(x)+0.5],[mean(y) mean(y)+0.5*minv],'Color','red')
axis equal

Hth,
Darren

"Saiful " <esaiful@gmail.com> wrote in message <h8q0sr$3mr$1@fred.mathworks.com>...
> Hi,
>
> How can I draw a perpendicular line from the mid-point of another line?
>
> Appreciate your help,
>
> Thanks and regards,
> KSI

Google -->
http://www.purplemath.com/modules/midpoint.htm

Jos