matlab计算矩阵中两点之间的距离（并取上三角元素）

%可以直接复制到matlab中运行
A = [ 0.556962683635638 0.349974807420603 0.305115372110084 0.000002523750663 0.222371895146779
0.081418757404744 1.000000000000000 0.593799304585264 0.999999665282946 0.217834378352090
0.521244537532609 0.371647125561766 0.330703590512164 0.005368304179213 0.841732982650073
0.560935561481429 0.247676776628313 0.280392927172519 0.989068504872821 0.186399064590135
0.582305945189380 0.427333652362798 0.317744094533103 0.089419238489798 0.588494240437538];
B = [ 0.011603107307295 0.996584561597667 0.999766475803639 0.999202183000456 0.000142767001378
0.999921788491337 0.987783903367998 0.999989527192321 0.006618911660346 0.011040461207632
0.272326742104102 0.318893653317547 0.976881396631581 0.633401754869020 1.000000000000000
0.745545533535626 0.985517018160134 0.999974639330349 0.999999304690064 0.028972619959063
0.663212638032978 0.143948877145798 0.988035780767058 0.013949328345476 0.6045840701070