squareform没有其它功能,只是把一行(或一列)数据整理成方阵。
如:
x=rand(6,2)*100; %产生一组随机数;
d=pdist(x),%计算相互间距离(以行向量表示);
d =
Columns 1 through 6
48.632 31.011 47.256 40.803 46.874 24.729
Columns 7 through 12
41.952 60.944 38.757 23.699 36.698 48.38
Columns 13 through 15
26.169 71.952 80.525D=squareform(d),%将其整理成方阵(相互间距离):
D =
0 48.632 31.011 47.256 40.803 46.874
48.632 0 24.729 41.952 60.944 38.757
31.011 24.729 0 23.699 36.698 48.38
47.256 41.952 23.699 0 26.169 71.952
40.803 60.944 36.698 26.169 0 80.525
46.874 38.757 48.38 71.952 80.525 0