Append text using fprintf
显示 更早的评论
Hi,
I'm trying to open a file and append data using fprintf.
For instance I have one line of the file
0001 1000 2000 mat1 0 10
I want to be able to append some text after the 10:
0001 1000 2000 mat1 0 10 289.6 259.6 etc..
How would I accomplish this? Do I use fprintf?
Thanks,
Mike
回答（1 个）
Walter Roberson
2016-11-14
0 个投票
You can only use fprintf() to append to a line of a file in one narrow case:
- the line to be appended to is the very last line of the file; and
- the line to be appended to does not end up carriage return or new line; and
- the file was not created in DOS mode ending in control-Z
In short, you can only append if the file just abruptly ends at the point that you want to append.
In this narrow case, open the file with 'a' or 'at' or 'a+' or 'at+' access mode and fprintf() will append to it.
类别
在 帮助中心 和 File Exchange 中查找有关 File Operations 的更多信息
2016-11-14
2016-11-14
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
