how to extract a specific text from text file

1 次查看（过去 30 天）
safa BY
safa BY 2018-8-16
编辑： Stephen23 2018-8-17
I extract this line from my file : {'1;158.798;281.117;99.858;39.855;2182;'} and Next step is to extract the second , third , fourth and fifth numbers like this : [158.798,281.117,99.858,39.855]
Any help please ?

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2018-8-16
编辑：Stephen23 2018-8-16
>> C = {'1;158.798;281.117;99.858;39.855;2182;'};
>> D = regexp(C,';','split');
>> D{1}(2:5)
ans =
'158.798' '281.117' '99.858' '39.855'
>> str2double(D{1}(2:5)) % convert to numeric
ans =
158.798 281.117 99.858 39.855
  7 个评论
显示 5更早的评论
safa BY
safa BY 2018-8-17
编辑：Stephen23 2018-8-17
Hello again Stephen, Can you help me please , ? I need to add a header to my textfile and this is my code :
for k=1:nbrRect
Cellule{k}=get(rectangles(k), 'Position');
tag= CellTag(k);
x1 = Cellule{k}(1)+Cellule{k}(3)/2;
y1 = Cellule{k}(2)+Cellule{k}(4)/2;
fprintf(fileID,'%d;%5.3f;%5.3f;%5.3f;%5.3f;%d;%5.3f;%5.3f;\n',tag,Cellule{k}(1),Cellule{k}(2),Cellule{k}(3),Cellule{k}(4),numf,x1,y1);
end
I added this line before fopen and the boucle for but there is no header in my file:
fprintf(fileID,'%d;%5.3f;%5.3f;%5.3f;%5.3f;%d;;%5.3f;%5.3f;\n','Person ID','pos1','pos2','Width','height','X centre','Y centre');
Stephen23
Stephen23 2018-8-17
编辑：Stephen23 2018-8-17
"I added this line before fopen and the boucle for but there is no header in my file"
That line will need to go after fopen and before the loop. You will also need to change the all of the format specifiers to %s.

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 Data Import and Export 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