lphtoby 发表于 2011-3-22 20:09

Matrix is close to singular or badly scaled.???WHY??

我运行一个循环程序, 程序结果是100个矩阵
运行程序是出现如下:
Warning: Matrix is close to singular or badly scaled.
         Results may be inaccurate. RCOND = 4.598423e-019.
> In Fisher at 28
Warning: Matrix is close to singular or badly scaled.
         Results may be inaccurate. RCOND = 2.353976e-019.
> In Fisher at 28
Warning: Matrix is close to singular or badly scaled.
         Results may be inaccurate. RCOND = 3.408787e-019.

。。。。
是什么意思?怎么解决

zhouyang664 发表于 2011-3-22 21:15

矩阵奇异,我看没办法解决,这是矩阵自身的性质决定的吧!

ChaChing 发表于 2011-3-23 00:17

看看是否本来就应该矩阵奇异, 若不是, 检查下构成矩阵有无错误!

ChaChing 发表于 2011-4-3 23:46

回复 1 # lphtoby 的帖子

Ref:
http://www.mathworks.com/matlabcentral/newsreader/view_thread/170919
http://groups.google.com/group/comp.soft-sys.matlab/browse_thread/thread/f640ae64aa62fbe6
http://dmpeli.mcmaster.ca/Matlab/Math1J03/LectureNotes/Lecture2_4.htm
...

北国之春 发表于 2013-11-24 16:53

ChaChing 发表于 2011-3-23 00:17 static/image/common/back.gif
看看是否本来就应该矩阵奇异, 若不是, 检查下构成矩阵有无错误!

出现这种警告对结果有什么影响吗
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