how to accumulate results from if, end
조회 수: 1 (최근 30일)
이전 댓글 표시
Dear all,
I'm checking points inside rectangle and I got result 1 for every point inside
, I want to accumulate this result but I don't no how to do it. could anyone help me. (i) is the points inside and the result is(PointsInside=1), my code is down
for m=1:11
AB=((XY(1,1)-XY(1,2))*(yy(:,m)-XY(2,2))-(XY(2,1)-XY(2,2))*(xx(:,m)-XY(1,2))>=0);
BC=((XY(1,2)-XY(1,3))*(yy(:,m)-XY(2,3))-(XY(2,2)-XY(2,3))*(xx(:,m)-XY(1,3))>=0);
CD=((XY(1,3)-XY(1,4))*(yy(:,m)-XY(2,4))-(XY(2,3)-XY(2,4))*(xx(:,m)-XY(1,4))>=0);
DA=((XY(1,4)-XY(1,1))*(yy(:,m)-XY(2,1))-(XY(2,4)-XY(2,1))*(xx(:,m)-XY(1,1))>=0);
if (AB||BC||CD||DA)==0
PointsInside=1
end
end
I hope somebody will help me
thanks
댓글 수: 0
채택된 답변
Geoff Hayes
2014년 10월 6일
imola - just define an empty array outside of your for loop, and add the point that is inside the rectangle to this array whenever it satisfies the condition. Something like
pointsInRect = [];
for k=1:11
AB=((XY(1,1)-XY(1,2))*(yy(:,k)-XY(2,2))-(XY(2,1)-XY(2,2))*(xx(:,k)-XY(1,2))>=0);
BC=((XY(1,2)-XY(1,3))*(yy(:,k)-XY(2,3))-(XY(2,2)-XY(2,3))*(xx(:,k)-XY(1,3))>=0);
CD=((XY(1,3)-XY(1,4))*(yy(:,k)-XY(2,4))-(XY(2,3)-XY(2,4))*(xx(:,k)-XY(1,4))>=0);
DA=((XY(1,4)-XY(1,1))*(yy(:,k)-XY(2,1))-(XY(2,4)-XY(2,1))*(xx(:,k)-XY(1,1))>=0);
if (AB||BC||CD||DA)==0
pointsInRect = [pointsInRect ; xx(1,k) yy(1,k)];
end
end
As for your conditions, you are saying that if all are false then the point must be in the rectangle. Is that correct?
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Logical에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!