poster
2019-12-10, 20:30
我正在使用pdist命令来查找存储在矩阵中的x和y坐标之间的距离。
X = [100 100; 0 100; 100 0; 500 400; 300 600;]; D = pdist(X,'euclidean') 返回15个元素的向量。 ：
[0.734979755525412 3.40039811339820 2.93175207511321 1.83879677592575 2.40127440268306 2.75251513299386 2.21488402640753 1.10610649500317 1.81674017301699 0.903207751535635 1.99116952754924 1.05069952386082 1.24122819418333 1.08583377275532 1.38729428638035] 有没有一种方法可以将这些距离与它们所源自的坐标相关联，即将它们存储在具有常规行形式的矩阵中：
[Length xcoordinate1 ycoordinate1 xcoordinate2 ycoordinate2] 找到的每种长度都有一行？
提前致谢
回答：
%# define X, D X = [100 100; 0 100; 100 0; 500 400; 300 600;]; D = pdist(X,'euclidean'); %# find the indices corresponding to each distance tmp = ones(size(X,1)); tmp = tril(tmp,-1); %# creates a matrix that has 1's below the diagonal %# get the indices of the 1's [rowIdx,colIdx ] = find(tmp); %# create the output out = [D',X(rowIdx,:),X(colIdx,:)];
更多&回答... (https://stackoverflow.com/questions/2476943)
X = [100 100; 0 100; 100 0; 500 400; 300 600;]; D = pdist(X,'euclidean') 返回15个元素的向量。 ：
[0.734979755525412 3.40039811339820 2.93175207511321 1.83879677592575 2.40127440268306 2.75251513299386 2.21488402640753 1.10610649500317 1.81674017301699 0.903207751535635 1.99116952754924 1.05069952386082 1.24122819418333 1.08583377275532 1.38729428638035] 有没有一种方法可以将这些距离与它们所源自的坐标相关联，即将它们存储在具有常规行形式的矩阵中：
[Length xcoordinate1 ycoordinate1 xcoordinate2 ycoordinate2] 找到的每种长度都有一行？
提前致谢
回答：
%# define X, D X = [100 100; 0 100; 100 0; 500 400; 300 600;]; D = pdist(X,'euclidean'); %# find the indices corresponding to each distance tmp = ones(size(X,1)); tmp = tril(tmp,-1); %# creates a matrix that has 1's below the diagonal %# get the indices of the 1's [rowIdx,colIdx ] = find(tmp); %# create the output out = [D',X(rowIdx,:),X(colIdx,:)];
更多&回答... (https://stackoverflow.com/questions/2476943)