Matlab:如何捕获警告 [英] Matlab: How to catch warning

问题描述

我正在MATLAB中运行一些数据处理工作，而求解器使用BACKSLASH运算符.有时，我会收到这样的警告:

I am running some data processing work in MATLAB and solver uses BACKSLASH operator. Sometimes, I get warning like this:

Warning: Rank deficient, rank = 1390, tol = 1.335195e-010.
Warning: Rank deficient, rank = 1386, tol = 1.333217e-010.

我想抓住那些警告. 我正在尝试将警告转换为错误，然后按照标题诱捕警告"中的说明进行捕获: http://undocumentedmatlab.com/blog/trapping-warnings-有效地 在示例中，以下字符串已用于将警告转换为错误:

I would like to catch those warnings. I am trying to convert warning to error and then catch it as described here under title "Trapping warnings": http://undocumentedmatlab.com/blog/trapping-warnings-efficiently In the example, following string has been used to convert warning to error:

s = warning('error', 'MATLAB:DELETE:Permission');

但是，我不确定用于我的情况的字符串.我尝试使用

However, I am not sure what string to use for my case. I tried using

s = warning('error', 'Warning: Rank deficient’);

但是，它没有用. 任何帮助将不胜感激.

But, it did not work. Any help would be appreciated.

关于， DK

推荐答案

您需要指定警告 identifier ，而不是警告文本.您可以使用lastwarn的两个输出形式找到标识符:

You need to specify the warning identifier, not the warning text. You can find the identifier using the two-output form of lastwarn:

[msgstr, msgid] = lastwarn

在您的情况下，我认为您想要的标识符是'MATLAB:rankDeficientMatrix'.

In your case, I think the identifier you want is 'MATLAB:rankDeficientMatrix'.

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