Reading particular values from a *.txt file and saving

Question

Cyros 2014-7-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/141740-reading-particular-values-from-a-txt-file-and-saving

评论： Cyros 2014-7-14

采纳的回答： Azzi Abdelmalek

在 MATLAB Online 中打开

hi folks,

the file i've got has this format:

DATA

 PIPE  MEDIUM     |     MASS-FLOW  MOLE-FLOW  VOL-FLOW  |  PRESSURE   
   NO  TYPE       |      [kg/s]    [kmol/s]    [m3/s]   |   [bar]        
    1  GASMIX     |      0.00156     0.00005    0.00085 |    1.0000      
                  |                             0.00085 |    1.0000      
    2  GASMIX     |      0.00156     0.00005    0.00415 |    1.0000      
                  |                             0.00415 |    1.0000      
    3  GASMIX     |      0.00178     0.00007    0.00927 |    1.0000     
 VOLTAGE/CELL         =     0.8000       [V]
 CURRENT DENSITY      =  3504.80         [A/m2]
 DC-POWER             =       1.6748     [kW]
 AC-POWER             =       1.5074     [kW]

i need to read the values of massflow of pipe nr.1 and of the ac-power. after that i need to save the values in a table after each run.

any ideas? thanks cyros

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Answer 1

Azzi Abdelmalek 2014-7-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/141740-reading-particular-values-from-a-txt-file-and-saving#answer_144985

在 MATLAB Online 中打开

fid = fopen('file.txt');
str={};
while ~feof(fid)
  str{end+1,1}=regexp(fgetl(fid),'(?<= \|).+(?=\|)','match')
end
fclose(fid);
str(cellfun(@isempty,str))=[]
str=str(3:end)
str=str(1:2:end)
a=cell2mat(cellfun(@(x)  str2num(x{1}),str,'un',0))
out=a(:,1)