Java 如何计算点数组列表的质心
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时间：2020-08-12 09:19:24 来源:igfitidea点击:
how to calculate centroid of an arraylist of points
提问by user2398101
I am trying to add up all the x and y coordiantes respectively from points of ArrayList.
我试图分别从 ArrayList 的点添加所有 x 和 y 坐标。
public static ArrayList knots = new ArrayList<Point>();
public Point centroid() {
Point center = new Point();
for(int i=0; i<knots.size(); i++) {
????????????????????
return center;
}
How do I find the centroid ??
我如何找到质心？
采纳答案by Philipp Sander
public Point centroid() {
double centroidX = 0, centroidY = 0;
for(Point knot : knots) {
centroidX += knot.getX();
centroidY += knot.getY();
}
return new Point(centroidX / knots.size(), centroidY / knots.size());
}
回答by Log Raj Bhatt
public Point centroid() {
Point center = new Point();
int sumofx=0,sumofy=0;
for(int i=0; i<knots.size(); i++) {
sumofx= sumofx+knot[i].x;
sumofy=sumofy+knot[i].y;
}
center.x=sumofx/knots.size();
center.y=sumofy/knots.size();
return center;
}
}
