MATLAB: Find intersection of graph

graph intersection

I have this graph like this

plot ([0,1,1,0,0,1,0.5,0],[0,1,0,1,0,0,1.5,0],'-')

how can I find all intersections in this graph?

Best Answer

https://www.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function

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MATLAB: Intersecting lines from coordinates and fixed lines

x1=val(:,2);
y1=val(:,3);
x2=[-226.586 , -238.954];
y2=[112.566 , 49.459];
plot(x1,y1,x2,y2)
P = InterX([x1.';y1.'],[x2;y2]);
plot(x1,y1,x2,y2,P(1,:),P(2,:),'ro')

MATLAB: Cannot get the same result in GA as I get in linprog

GA solver is stochastic in nature, there should be no reason to expect the same results as that of linprog. Infact you may not even get the same results for two successive runs of GA.

However there are ways to make the results closer by including a hybrid solver. Change the opts as follows:

opts = gaoptimset('StallGenLimit',500,'Generations',500,'TolFun',1e-1,'HybridFcn',@fmincon);

More info here:

http://www.mathworks.com/help/gads/gaoptimset.html

Best Answer

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MATLAB: Intersecting lines from coordinates and fixed lines

MATLAB: Cannot get the same result in GA as I get in linprog

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