Finding intersection point of the lines

on 2 Mar 2012
Latest activity Commented on by NIT JAMSHEDPUR

on 10 Apr 2015

Jonathan Sullivan (view profile)

Hi I have data sets for two lines. i.e. x1,y1 and x2,y2. So i can plot the lines using these point data sets. I would like to know the point (x,y)where these lines intersect each other. Please note that i have tried both [x,y]=intersections(x1,y1,x2,y2); and [x,y]=curveintersect(x1,y1,x2,y2);

i would appreciate if you can tell me the exact command for this purpose.

Regards

NIT JAMSHEDPUR

NIT JAMSHEDPUR (view profile)

on 10 Apr 2015

after poltting completed just select data curser from tool bar click where u want to find the coordinates

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on 2 Mar 2012

Andrei Bobrov (view profile)

on 5 Mar 2012
```data = rand(20,3);
x1 = sort(data(:,2));
x2 = sort(data(:,3));
y = data(:,1);
pp = interp1(x1,y,'linear','pp');
pp2 = interp1(x2,y,'linear','pp');
xx = xx(max(x1(1),x2(1)) <= xx & min(x1(end),x2(end)) >= xx);
func = @(x)ppval(pp,x)-ppval(pp2,x);
xb = xx([true; diff(func(xx) > 0) ~= 0]);
i1 = hankel(1:2,2:numel(xb));
xout = arrayfun(@(z)fzero(func, xb(i1(:,z))), (1:size(i1,2))' )
```