Unable to determine formatSpec while reading .txt file by fscanf

Question

aero123 2020-11-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/636225-unable-to-determine-formatspec-while-reading-txt-file-by-fscanf

回答： Ameer Hamza 2020-11-4

采纳的回答： Ameer Hamza

a.txt

在 MATLAB Online 中打开

Hi, i'm trying to make [n , 4] table with the a.txt

I need only need numeric datas but i have no idea which formatSpec i need to use.

I have no idea how to deal with the space blanks between numbers i need.

a = fopen('a.txt' ,'r')
data = fscanf(a , FromatSpec , [4 inf])

Please let me know which formatSpec i need to use.

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Walter Roberson 2020-11-4

textscan with headerlines set to about 9 or 10 (not sure from my phone)

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Answer 1

Ameer Hamza 2020-11-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/636225-unable-to-determine-formatspec-while-reading-txt-file-by-fscanf#answer_534325

在 MATLAB Online 中打开

This is one way:

lines = strsplit(fileread('a.txt'), '\n', 'CollapseDelimiters', false);
idx = find(contains(lines, 'Global Statistics'));
idx = [9 idx+10];
data = cell(1, numel(idx));
fid = fopen('a.txt' ,'r');
line_read = 0;
for i = 1:numel(idx)
    data{i} = textscan(fid , '%f %f %f %f', 'HeaderLines', idx(i)-line_read);
    line_read = idx(i) + numel(data{i}{1})+1;
end
fclose(fid);
[data, idx] = cellfun(@(x) deal({[x{:}]}, isempty(x{1})), data);
data(idx) = [];