How do I get an element from a string?

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Kratos 2015-2-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/179531-how-do-i-get-an-element-from-a-string

编辑： Kratos 2015-2-21

Say I have a vector representing a row and column which is (5,6) and I have a

 vec = (5,6);
 string = ['oNTitsr
           reaqBtr
           sggtalu
           imnvomo
           nresgLm
           eamhomt
            lfHoan
           sn mnin']
When I do 
 a  = string(vec);
 I get a = 'ne'

and when I do

 a = string(5,6);
 a = 'L'

I am suppose to get 'L' but I keep getting 'ne' when I run my code.

vec = (5,6) is just an example it can be anything. How do I do it?

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Andrew Newell 2015-2-21

在 MATLAB Online 中打开

Is that really the code you used? It should produce errors right from the start. The line

vec = (5,6);

results in

Error: Expression or statement is incorrect--possibly unbalanced (, {, or [.

The string definition you used gives

Error: String is not terminated properly.

Kratos 2015-2-21

编辑：Kratos 2015-2-21

It was suppose to be vec = [5,6]

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Answer 1

Andrew Newell 2015-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/179531-how-do-i-get-an-element-from-a-string#answer_168756

编辑：Andrew Newell 2015-2-21

在 MATLAB Online 中打开

Here is some code that works:

vec = {5,6};
S = ['oNTitsr';
   'reaqBtr';
   'sggtalu';
   'imnvomo';
   'nresgLm';
   'eamhomt';
   ' lfHoan';
   'sn mnin'];
S(5,6)
S(vec{:})

Some features of this code that are needed:

Each row of the char array is surrounded by quotes; semicolons makes it a column vector.
They all have to have the same length - hence the space at the beginning of ' lfHoan'.
A cell array is used for vec. Using {:} returns a list:

vec{:}

ans =

5

ans =

6