if i have number as index, and 300 character how i can find the chacter of these indexs

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Mohamuud hassan 2015-5-22

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https://ww2.mathworks.cn/matlabcentral/answers/218035-if-i-have-number-as-index-and-300-character-how-i-can-find-the-chacter-of-these-indexs

评论： Mohamuud hassan 2015-5-22

hello all; i have on e question which is: if i have to vectors, the first one it stored 300 English characters and the second for 20 index. how i can get character of those index .

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Answer 1

Azzi Abdelmalek 2015-5-22

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https://ww2.mathworks.cn/matlabcentral/answers/218035-if-i-have-number-as-index-and-300-character-how-i-can-find-the-chacter-of-these-indexs#answer_180027

在 MATLAB Online 中打开

a='abcdefg'
id=[1 3 5]
out=a(id)

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Mohamuud hassan 2015-5-22

编辑：Mohamuud hassan 2015-5-22

在 MATLAB Online 中打开

thank you Azzi Abdelmalek. my brother this is the example:

Cover={'In this study, capacity and security issues of text steganography have been considered to improve by proposing a novel approach. For this purpose, a text steganography method that employs data compression has been proposed. Because of using textual data in steganography, the employed data compression algorithm has to be lossless. Accordingly, LZW data compression algorithm has been chosen due to its frequent use in the literature and significant compression ratio. The proposed method constructs – uses stego keys and employs Combinatorics-based coding in order to increase security. Secret information has been hidden in the chosen text from the previously constructed text base that consists of naturally generated texts. Email has been chosen as communication channel between the two parties,s'}
Ex_distance=[72,73,127,136,160,174,175,229,230,238,239,240,241,247,249,291,292,655,672,706];
for ex_sec_out=1:length(Ex_distance)
     for ex_sec_inn=1:length(Cover)
         Ex_char_tem(ex_sec_inn,ex_sec_out)=Cover(Ex_distance(ex_sec_inn,ex_sec_out),ex_sec_out);      
     end
 end
Index exceeds matrix dimensions.

Error in kuday (line 6) Ex_char_tem(ex_sec_inn,ex_sec_out)=Cover(Ex_distance(ex_sec_inn,ex_sec_out),ex_sec_out); >>

Mohamuud hassan 2015-5-22

在 MATLAB Online 中打开

thank you Stephen, i employed your idea and i get the result. my question is how i can change this statement:

Cover={'In this study, capacity and security issues of text steganography have been considered to improve by proposing a novel approach. For this purpose, a text steganography method that employs data compression has been proposed. Because of using textual data in steganography, the employed data compression algorithm has to be lossless. Accordingly, LZW data compression algorithm has been chosen due to its frequent use in the literature and significant compression ratio. The proposed method constructs – uses stego keys and employs Combinatorics-based coding in order to increase security. Secret information has been hidden in the chosen text from the previously constructed text base that consists of naturally generated texts. Email has been chosen as communication channel between the two parties,s'} 
into, using builtin function or converter.
Cover='In this study, capacity and security issues of text steganography have been considered to improve by proposing a novel approach. For this purpose, a text steganography method that employs data compression has been proposed. Because of using textual data in steganography, the employed data compression algorithm has to be lossless. Accordingly, LZW data compression algorithm has been chosen due to its frequent use in the literature and significant compression ratio. The proposed method constructs – uses stego keys and employs Combinatorics-based coding in order to increase security. Secret information has been hidden in the chosen text from the previously constructed text base that consists of naturally generated texts. Email has been chosen as communication channel between the two parties,s';