Finding intersection points of two lines?

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youngjin cho
youngjin cho 2017-10-10
回答： Image Analyst 2017-10-10
Do you know how to get those intersections btw two lines? the actual intersection points.. I have x from 0 to 40 and y from 0 to 100 which are divided 3600 points.
figure, plot(Stroke,Force);
hold on
coe = polyfit([3.8780 6.8480], [20.0531 60],1);
a = coe(1); b = coe(2);
y = a*Stroke + b;
y1 = a*Stroke +b + 0.02*b;
grid, plot(Stroke,y1)
ylim([0 100])
this is my code so far, Could you help me, anyone asap?

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回答（1 个）

Image Analyst
Image Analyst 2017-10-10
Compute the absolute differences
absDiff = abs(Force - y1);
Then sort and find out the 3 smallest distances
[sortedDiffs, indexes] = sort(absDiff);
Then look at indexes(1:3)
crossingStrokes = Stroke(indexes(1:3));

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