xiahouzuoxin您好！您的博文：http://blog.csdn.net/xiahouzuoxin/article/details/39582483中的代码我用MATLAB调试时提示：Input argument "s" is undefined.Error in ==> kalmanf at 150if ~isfield(s,'x'); s.x=nan*z; end请问是怎么回事？望不吝赐教！！