1. Matlab怎么判断空矩阵http://www.ilovematlab.cn/thread-48915-1-1.html a=[ ] if isempty(a) 2.matlab寻找多个最大值位置http://zhidao.baidu.com/link?url=6zNKvA9qfvbKVCu3eC8032XVEqvULhVhxIb162EA2pOB2jBPmw6eYS9uuOSNLy-aMoU9odWX_wEVBsOQiVp9G_ a=[2,4,3,5,2,3,5;2,3,4,7,5,4,