How to remove \n and empty line after combine all the lines into an array

15 次查看（过去 30 天）
Fat Man
Fat Man 2019-6-15
编辑： per isakson 2019-6-15
I have a txt file 'map1.txt'
1 Ai.A
2 i.i.
3 .Aii
4 AiiA
I want to concatenate all the lines of the file into an array.
'Ai.A'
'i.i.'
'.Aii'
'AiiA'
However, my arr includes ↵ and ' '
'Ai.A↵'
'i.i.↵'
'.Aii↵'
'AiiA↵'
' '
Can anyone show me how to remove ↵ and ' '
This is my code. Thank you for your help!!!
fh = fopen('map1.txt')
line = fgets(fh)
vec = [line]
while ischar(line)
line = fgets(fh);
vec(end+1,:) = line;
end

请先登录，再回答此问题。

采纳的回答

per isakson
per isakson 2019-6-15
编辑：per isakson 2019-6-15
Replace
fgets
by
fgetl
fgetl, Read line from file, removing newline characters
In response to comment
To remove the ending "blank" row, replace
while ischar(line)
by
while not(feof(fh))
while not(feof(fh)) avoids reading one or more trailing empty lines, i.e. lines containing only newline characters.
To remove trailing rows that contains pure white-space add these lines to the end of the script
while isempty(strtrim(vec(end,:)))
vec(end,:)=[];
end
  6 个评论
显示 4更早的评论
per isakson
per isakson 2019-6-15
编辑：per isakson 2019-6-15
Surprice! The last row are not spaces, it's nulls
>> double(vec)
ans =
65 105 46 65
105 46 105 46
46 65 105 105
65 105 105 65
0 0 0 0
The last row is caused by one trailing empty line in combination with while ischar(line)
See the addendum to my answer.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 File Operations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by