On 3/23/2013 6:24 PM, dpb wrote: > On 3/23/2013 6:17 PM, angelina wrote: > ... > >> The thing is , that for the first line I don't have the equation.I only >> have the three points .Is there a way to find it in Matlab? > > How would you find it given the points using pencil and paper? That > should give you an idea of how to find it using Matlab. > > Do you know a priori the points are identically on a straight line or is > this a regression problem?
OK, I looked at the actual data points -- I see it is a segmented curve you've drawn. OK, one way w/o computing the coefficients of the line in Matlab (easy enough, of course :) ) to fine your intersection point would be via
Think of which it is that you're looking for while reading...