是否有Matlab函数将任何数据结构转换为字符串? [英] Is there a Matlab function to convert any data structure to a string?

问题描述

我正在寻找Matlab中用于产生错误消息的函数，如下所示:

I'm looking for a function in Matlab to use for error messages, like so:

error(['Invalid value for someVariable: ' wantedFunction(someVariable)]);

我希望wantedFunction能够同时接受字符串，数组，单元格数组，理想情况下甚至可以接受结构数组.

I want wantedFunction to be able to take both strings, arrays, cell arrays, ideally even structure arrays.

目前，我正在使用num2str，但这不适用于单元格.我以为我想用sprintf可以完成什么，但是我还没有弄清楚该怎么做.我想我可以编写自己的函数，但是如果在Matlab中已经可以做到这一点，那将是多余的.有什么想法吗?

For now, I'm using num2str, but that doesn't work for cells. I thought what I want could be done with sprintf, but I haven't figured out how. I suppose I could write my own function, but that would be redundant if there already is a way to do this in Matlab. Any ideas?

推荐答案

是的，尽管不是很简单.您必须将disp与evalc结合使用:

Yes, although it's not straightforward. You have to use the disp in combination with evalc:

string = evalc(['disp(someVariable)'])

您可以将其转换为更易于管理的形式:

You could cast this into more manageable form:

toString = @(var) evalc(['disp(var)']);

因此，以您的示例为例:

So, for your example:

>> var = {rand(3,1), 'A', struct('test', 5)};
>> error(['Invalid value for var: ' toString(var)])

??? Invalid value for var:     [3x1 double]    'A'    [1x1 struct]

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