I want to read data and variable name from txt file

T = readtable('input_file_test.txt');
T.Properties.VariableNames = {'Variable','Value'}
T = 5×2 table
     Variable      Value
    ___________    _____

    {'Lser'   }     0.4 
    {'Lser_Tx'}     0.5 
    {'Qc'     }      50 
    {'Ql'     }      50 
    {'Cshu'   }       1 

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Voss 2022-6-16

在 MATLAB Online 中打开

text_file.txt

If all you need is the section between the VAR line and the CKT line, here's one way to do it:

fid = fopen('text_file.txt');
data = fread(fid,'*char').';
fclose(fid);
start_idx = strfind(data,'VAR');
end_idx = strfind(data,'CKT');
C = strsplit(data(start_idx(1)+3:end_idx(1)-1),{'=' '\n' '\r'});
C = strtrim(reshape(C(2:end-1),2,[]).')
C = 7×2 cell array
    {'Lser'   }    {'0.4'}
    {'Lser_Tx'}    {'0.4'}
    {'QC'     }    {'70' }
    {'QL'     }    {'60' }
    {'Lshu'   }    {'4'  }
    {'fQ'     }    {'250'}
    {'Cshu'   }    {'1'  }

Now you have a cell array C containing the text from that section in two columns.

If you want that second column to be numeric you can do this:

C_cell = C;
C_cell(:,2) = num2cell(str2double(C_cell(:,2)))
C_cell = 7×2 cell array
    {'Lser'   }    {[0.4000]}
    {'Lser_Tx'}    {[0.4000]}
    {'QC'     }    {[    70]}
    {'QL'     }    {[    60]}
    {'Lshu'   }    {[     4]}
    {'fQ'     }    {[   250]}
    {'Cshu'   }    {[     1]}

And if you want the final result to be a table, you can do this:

C_table = cell2table(C_cell,'VariableNames',{'Variable' 'Value'})
C_table = 7×2 table
     Variable      Value
    ___________    _____

    {'Lser'   }     0.4 
    {'Lser_Tx'}     0.4 
    {'QC'     }      70 
    {'QL'     }      60 
    {'Lshu'   }       4 
    {'fQ'     }     250 
    {'Cshu'   }       1 

Voss 2022-6-16

Most functions have a "See Also" section at the end of their documentation page, which contains links to other related functions that may be useful:

https://www.mathworks.com/help/matlab/ref/strsplit.html#btnav5t_seealso

https://www.mathworks.com/help/matlab/ref/strtrim.html#bu8cvc2_seealso

Aakriti Srivastava 2022-6-16

Thank you :)

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