如何使用MATLAB的substruct函数创建表示使用&"end&"的引用的结构? [英] How do I use MATLAB's substruct function to create a struct representing a reference that uses "end"?

问题描述

我想使用 substruct 函数来创建要在 subsref 中使用的结构.目的是使用 subsref 而不是通常的()标记来索引字符串，因为我正在对函数的输出进行下标.这是我要执行的操作的简单示例(在我的实际代码中，此示例在 cellfun 中使用，因此字符串的长度可以不同，并且替换并不总是在同一地点):

I'd like to use the substruct function to create a structure for use in subsref. The purpose is to index a string using subsref instead of the usual ( ) notation because I'm subscripting the output of a function. This is a simple example of what I'm trying to do (in my actual code, this is used within a cellfun, so the strings can be of different lengths and the replacement isn't always in the same place):

data = 'quick brown fox';
data2 = strrep(data, 'brown', 'green');
data2(7:end)

在这里我尝试使用 substruct 定义此下标:

Heres where I tried to define this subscripting with substruct:

data = 'quick brown fox';
S = substruct('()', {[7:end]});
subsref(strrep(data, 'brown', 'green'), S)

但这给我一个错误:

Error using substruct (line 30)
SUBSTRUCT takes at least two arguments.

Error in myfile (line 3)
S = substruct('()', {(7:end)});

我已经遍历了 substruct 和 subsref 的文档，没有人提到 end .我该怎么做?

I've been over and over the documentation for both substruct and subsref, and no where do they mention end. How do I do this?

推荐答案

据我所知，没有办法使用 subsref 做到这一点，假定您确切知道哪些 subs 您将需要.

There is no way to my knowledge to do that with subsref which assumes you know exactly which subs you will need.

使用 @function_handle 动态确定 end :

f = @(x) x(7:end);
f(strrep(data, 'brown', ''))
ans =
  fox

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