How to convert 'comma' to 'dot'?
21 ビュー (過去 30 日間)
古いコメントを表示
採用された回答
Thorsten
2016 年 6 月 16 日
編集済み: Thorsten
2016 年 6 月 16 日
You can use my function fstrrep to replace each . with a , and then use dlmread to read the data:
fstrrep('test22.txt', ',', '.')
data = dlmread('test22.txt')
The m-file:
function fstrrep(filename, oldsubstr, newsubstr, newfilename)
%FSTRREP Replace string in file.
%
%FSTRREP(FILENAME, OLDSUBSTR, NEWSUBSTR, [NEWFILENAME])read each line in
%FILENAME and replaces the string OLDSUBSTR with NEWSUBSTR and writes the
%new line to NEWFILENAME. If the optional argument NEWFILENAME is not
%given, the contents of the original file is changed.
%
%Example: In file 'test.txt', replace each ',' with a '.'
% fstrrep('test.txt', ',' '.')
%
%Thorsten.Hansen@psychol.uni-giessen.de
%%open file to read from and new file to write to
fid1 = fopen(filename, 'r');
if fid1 == -1
error(['Cannot open file ' filename ' for reading.']);
end
if nargin < 4
newfilename = '_temp.txt';
end
fid2 = fopen(newfilename, 'w');
if fid2 == -1
error(['Cannot open file ' newfilename ' for writing.']);
end
%%read line and write changed line to new file
line = fgets(fid1);
while line ~= -1
newline = strrep(line, oldsubstr, newsubstr);
fprintf(fid2, '%s', newline);
line = fgets(fid1);
end
%%close both files
st = fclose(fid1);
if st == -1
error(['Cannot close ' filename '.'])
end
st = fclose(fid2);
if st == -1
error(['Cannot close ' tempfilename '.'])
end
%%replace old file with new file
if nargin < 4
movefile(newfilename, filename)
end
その他の回答 (1 件)
Azzi Abdelmalek
2016 年 6 月 10 日
編集済み: Azzi Abdelmalek
2016 年 6 月 10 日
a=importdata('test2.txt')
b=strrep(a,',','.')
c=cell2mat(cellfun(@str2num,b,'un',0))
2 件のコメント
Mohamed Asaad
2022 年 2 月 7 日
Hi! This works for me. However when i use files including negative value or Nan, it does not work. I get error message " Conversion to double from struct is not possible."
DGM
2022 年 2 月 7 日
編集済み: DGM
2022 年 2 月 7 日
The output type of importdata() varies depending on how it manages to split the text based on the specified delimiters. There are probably other ways to do this, but consider this. I've simply renamed the extensions so that they can be uploaded and run here.
A = importdata('Au_1_E_chem_experiment_SPR_angle_offset_after_PEG.txt',' ');
A = strrep(A,',','.'); % convert commas to dots
A = regexp(A,'([^\t]*)','tokens'); % split each line into its elements
B = cellfun(@str2double,vertcat(A{:})); % convert to numeric
B(1:10,:) % show a sample
Similarly for the other file
A = importdata('Au_1_E_chem_experiment_TIR_angle.txt',' ');
A = strrep(A,',','.'); % convert commas to dots
A = regexp(A,'([^\t]*)','tokens'); % split each line into its elements
B = cellfun(@str2double,vertcat(A{:})); % convert to numeric
B = B(2:end,:); % strip off the header
B(55:64,:) % show a sample
参考
カテゴリ
Help Center および File Exchange で Convert Image Type についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!