Extract number from a specified row in a text file

Question

FengwuQiu 2015-3-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/195218-extract-number-from-a-specified-row-in-a-text-file

评论： Michael Haderlein 2015-3-31

analysis.txt.log

I have a text file as following; ...... Generating defect surface mesh. Validating triangle mesh. Defect surface time: 0.012 sec Writing analysis results to output file 'myten.15400000.dislocations.ca'. Smoothing defect surface mesh. Calculating normals of defect surface mesh. Wrapping defect surface mesh at simulation cell boundaries. Writing dislocations to output file 'myten.15400000.dislocations.vtk'. Simulation cell volume: 1.38059e+07 Total dislocation line length: 4785.1 [bcc] 1/2<111>: 3729.51 [bcc] 100: 1055.58 [bcc] 110: 0 Other Burgers vectors: 0 Total analysis time: 17.225 sec.

Now, I want to extract the volume, total dislocation line length, and three other line length.That is to say, I want to get these values, 1.38059e+07, 4785.1, 3729.51, and 1055.58

The txt file is attached.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Michael Haderlein 2015-3-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/195218-extract-number-from-a-specified-row-in-a-text-file#answer_173229

编辑：Michael Haderlein 2015-3-30

在 MATLAB Online 中打开

If the file size is this small and you don't have too many files to read, you can go with this very simple solution:

keywords={'Simulation cell volume: ','Total dislocation line length: ','  [bcc] 1/2<111>: ','  [bcc] <100>: ','  [bcc] <110>: '};
output=zeros(size(keywords));
fid=fopen('test.txt');
curline=fgetl(fid);
while ischar(curline)
  output(cellfun(@(c) ~isempty(findstr(curline,c)),keywords))=str2double(curline(strfind(curline,':')+1:end));
  curline=fgetl(fid);
end
fclose(fid);