Concatenate data using fgets

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Zhonghao Liao
Zhonghao Liao 2016-9-29
评论： Zhonghao Liao 2016-9-29
I want to read a data pattern from a txt file and concatenate each line together. I wrote the following program but the error message shows:
function read_datapattern(filename)
fid = fopen(filename,'rt');
if fid < 0
error('error opening file %s\n\n',filename);
end
pattern = fgets(fid);
for n = 1:32767
nextline = fgets(fid);
pattern = strcat(pattern, nextline);
fprintf(pattern);
fprintf('\n');
fclose(fid);
end
"Invalid file identifier. Use fopen to generate a valid file identifier." "nextline = fgets(fid);"
How do I need to modify the program? Thank you~

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采纳的回答

KSSV
KSSV 2016-9-29
编辑：KSSV 2016-9-29
You are closing the file in the loop. close the file after the loop. I assume the below should work.
function read_datapattern(filename)
fid = fopen(filename,'rt');
if fid < 0
error('error opening file %s\n\n',filename);
end
pattern = fgets(fid);
for n = 1:32767
nextline = fgets(fid);
pattern = strcat(pattern, nextline);
fprintf(pattern);
fprintf('\n');
end
fclose(fid);

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