about write in file

UTA
2013 6 3
2 个回答
回答已采纳
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0 个投票

Hi everyone: I have a exist file named as 'data.txt', and I want to write data into the file in every loop; but the update data always overwrite on the previous, how can I avoid this problem and write data in file as the size of n*2; my code as follow: the size of matrix h is n*2;
for i = 1 : 10
fid = fopen('data.txt','w+');
fprintf(fid,'%d\n',h(i,:));
fclose(fid);
end
Thank you so much!

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 采纳的回答

Walter Roberson
Walter Roberson 2013-6-3

0 个投票

for i = 1 : 10
fid = fopen('data.txt','at');
fprintf(fid,'%d\n',h(i,:));
fclose(fid);
end

更多回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-6-3

1 个投票

fid = fopen('data.txt','w+');
for i = 1 : 10
fprintf(fid,'%d\n',h(i,:));
end
fclose(fid);

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