How to take a data form text file to put it in another file?

4 次查看（过去 30 天）
Yamina chbak
Yamina chbak 2022-2-3
评论： Yamina chbak 2022-2-4

Hi,
I have a text file called File.1.node which contain such as:
45 12 7 1 ( first line )
1 2 1 1
2 3 2 1
3 4 5 1
.....
% File.1.node is complete (last line )

I want to take the data from File.1.node without first line and last line, to put it in another file named Node.dat.
But How i write a code for this problem?
Thanks in advance.

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2022-2-3
Try this —
fidi = fopen('File.1.node','rt');
F1c = textscan(fidi, '%f%f%f%f', 'HeaderLines',1, 'CollectOutput',1);
fclose(fidi);
F1 = cell2mat(F1c);
dlmwrite(F1, 'Node.dat')
.
  4 个评论
显示 2更早的评论
Star Strider
Star Strider 2022-2-4
@Stephen — Thank you.
The other answer was originally accepted, and I deleted my original (correct) answer as the result. I got an e-mail requesting that I re-post it so that it could be accepted. I did it from memory, and did not remember the correct argument order to dlmwrite (correct in my original answer) because I rarely used it even before writematrix appeared. (My original answer used readmatrix and writematrix, however A Achbak does not have access to them. The dlmwrite call appeared in a subsequent Comment.)
Yamina chbak
Yamina chbak 2022-2-4
Yes, I understand that now, well when I used dlmwrite (filename must be come first), it gives me a data but not form a matrix ( it was like : 1,2,1,1 2,3,2,1 .... ) So I prefer use @Stephen's code (removing the loop and the superfluous square brackets). Thanks you @Stephen.

请先登录，再进行评论。

更多回答（1 个）

David Hill
David Hill 2022-2-3
See what readmatrix gives you
m=readmatrix('File.1.node.txt');
m(1,:)=[];
writematrix(m,'Node.dat');
If you do not attach the file, we cannot test.
  5 个评论
显示 3更早的评论
Yamina chbak
Yamina chbak 2022-2-3
编辑：Yamina chbak 2022-2-4
Yes It's working now ! it can read the first raw. Thanks you so much @David Hill.
But, i just checked that it gives me a wrong data, so i just say myself maybe my text file is not organize to know where is the raw and the colone o the matrix.
Thanks you again @David Hill.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Data Import and Export 的更多信息

标签

产品


版本

R2018b

Community Treasure Hunt

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

Start Hunting!

Translated by