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generate multiple text files from a matrix

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fadzhi
fadzhi 2021 年 1 月 15 日
コメント済み: Jon 2021 年 1 月 15 日
Hi all,
i have a 1000 x 2 matrix and i want to generate 1000 text files with two lines with first entry from first colum of matrix and second from second (for first files and so on till 1000). Will appreciate any help in this regard
a = 1...1000
b = 1001...2000
txt1= (1,10001)
....
......
txt1000 = (1000, 2000)

採用された回答

Mathieu NOE
Mathieu NOE 2021 年 1 月 15 日
hello
see below
data = [(1:1000)' 1000+(1:1000)'];
for ci = 1: size(data,1)
str = ['(' num2str(data(ci,1)) ',' num2str(data(ci,2)) ')'];
filename = ['file_out' num2str(ci) '.txt'];
writematrix(str, filename,"QuoteStrings",0);
end

その他の回答 (1 件)

Jon
Jon 2021 年 1 月 15 日
While I was working on this I see you have already received an answer. This is probably similar to what Mathieu has already submitted, but since I had already spent time preparing it I'll provide it as an alternative. I like to put leading zeros on my filenames e.g. txt00001.csv, txt0002.csv, ... txt0999.csv, txt1000.csv as you can then easily retrieve them in alphabetical (dictionary) order.
baseName = 'txt'
A = rand(1000,2)
% loop through data making individual files for each row
numRows = size(A,1);
for k = 1:numRows
% build filename % e.g. txt083.csv
filename = [baseName,num2str(k,'%04d'),'.csv'];
% write data to file
writematrix(A(k,:),filename)
end
  1 件のコメント
Jon
Jon 2021 年 1 月 15 日
By the way, I wonder why you are creating so many smaill files. Often there is a more efficient alternative, but I can't offer any suggestions without knowing what your overall problem is

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