How can i read the value (string or number) of a variable?

Question

Philipp Mueller 2016-12-1

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评论： Philipp Mueller 2016-12-1

aaa.txt

Hello,

I read my input-data from a .txt-File. Now i want to use some of this variables in my script for formating and calculations.... Maybe the question is strange but anyway.... How can i read the value of the variable number_of_plots or color? Is there an easy way except using a for loop + Delimiter and so on? Thank you

My Code:

diagramoptions = []; 
wholecontent = fileread('aaa.txt') 
sections = regexp(wholecontent, '\*+([^*]+)\*+([^*]+)', 'tokens') 
for section = sections 
   switch(strtrim(section{1}{1})) 
         case 'Diagram Options' %Diagram Options -> siehe meine Gliederung im .txt file 
            keyvalues = regexp(section{1}{2}, '([^\n\r=]+)=([^\n\r=]+)', 'tokens')%\n -> new line; \r carriage return 
            diagramoptions = cell2table(vertcat(keyvalues{:}), 'VariableNames', {'Key', 'Value'}) 
        otherwise 
            warning('Unknown section: %s', section{1}{1}) 
     end 
  end 
openvar diagramoptions

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Answer 1

Jan 2016-12-1

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https://ww2.mathworks.cn/matlabcentral/answers/314897-how-can-i-read-the-value-string-or-number-of-a-variable#answer_245509

编辑：Jan 2016-12-1

在 MATLAB Online 中打开

What do you exactly want? Searching for a specific token or importing all tokens before the '='?

Searching for a specific token:

contentS = fileread('aaa.txt');
content  = regexp(contentS, '\n', 'split')
pattern  = 'number_of_plots';
match    = strncmp(content, [pattern, '='], length(pattern) + 1);
Data.(pattern) = sscanf(content{match}, [pattern, '=%g'], 1);

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Jan 2016-12-1

@Philipp: What does "select directly from diagramoptions variable" exactly mean? Not directly out of the txt file? I don't get it. Please post again, what you want to achieve.

Please do not cross-post a question in different forums. Thanks.

Philipp Mueller 2016-12-1