read a text file or not read it

Question

Rica 2012-11-7

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/53042-read-a-text-file-or-not-read-it

Hi I have a lot of text files.

% 
file1.txt
file2.txt.
.
.
.
.
file100

i read this files with this function:

%

for k=1:100

    fid=fopen(['file_' num2str(k)  '.txt']);
    if fid == -1, error('Cannot open file'),end         
    result{k,1}=textscan(fid,'%f %f %f %f %f');
    fclose(fid)
end

i want to scip reading file50.txt and file69.txt. How could i do this with matlab. tell hem not to read these both files? Thank you

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Answer 1

Jan 2012-11-7

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https://ww2.mathworks.cn/matlabcentral/answers/53042-read-a-text-file-or-not-read-it#answer_64609

在 MATLAB Online 中打开

Or if you do not want to hard code it:

result = cell(1, 100);
index  = 0; 
for k=1:100
  fid = fopen(['file_' num2str(k)  '.txt']);
  if fid ~= -1
    result{index, 1} = textscan(fid,'%f %f %f %f %f');
    fclose(fid)
  end
end
result = result(1:index);  % Crop empty cells

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Rica 2012-11-7

great!! Thanks Jan

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Answer 2

José-Luis 2012-11-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/53042-read-a-text-file-or-not-read-it#answer_64608

编辑：José-Luis 2012-11-7

在 MATLAB Online 中打开

idx = 1:100;
idx([50 69]) = []; %You could also use an if statement inside the loop, but this might be more efficient
for k=idx
    fid=fopen(['file_' num2str(k)  '.txt']);
    if fid == -1, error('Cannot open file'),end         
    result{k,1}=textscan(fid,'%f %f %f %f %f');
    fclose(fid)
end