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write in a specific line of text file

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hamed
hamed 2018-1-24
回答： Rik 2018-1-24
Hi all,
I'm writing a code and I would save the result in a specific line of text file. for example, the code should write the result on .txt file from line 6 or 7 but I don't know how can I do it. I've used
fid = fopen('z.txt', 'w');
fprintf(fid, '%d\r\n',MyResult);
fclose(fid)
But it can just write in a new line no each line as I want. Could you please help me
Hamed
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Rik
Rik 2018-1-24
If you want to append lines, read the doc. If you want to do something else, you'll have to explain it more, preferably with some examples, because right now, I don't know if I understand you.
hamed
hamed 2018-1-24
ok, let me explain more I have a text file with 6 lines header, for example, name and address of a company
my code creates a matrix (50*5) and I want to add this matrix after line 8.

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回答（1 个）

Rik
Rik 2018-1-24
Use the append switch in fopen, fprinft an empty line, and fprintf the matrix with the FormatSpec of your choosing.

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