清空筛选条件
清空筛选条件

Load text file with open braket ( )

3 次查看（过去 30 天）
Shan Chu
Shan Chu 2018-3-22
评论： Birdman 2018-3-22
Dear all,
I have a txt file in the format like:
(70.0362+32052.7j)
(-1.16529e-12+29239.2j)
(-1.42109e-13+26859.3j)
...
Then I used the following code:
fid = fopen('ImpedanceMatrix1.txt','r');
A = textscan(fid,'%s');
fclose(fid);
A = A{:};
However, it doesn't remove the brackets in the variable. Could you please suggest me how to do that. Thanks.
  3 个评论
显示 1更早的评论
Shan Chu
Shan Chu 2018-3-22
Hi sir, I am not good at Matlab. I used Load before but it doesn't work. Could you please suggest which function that I could use? Thanks
Stephen23
Stephen23 2018-3-22
编辑：Stephen23 2018-3-22
@Shan Chu: I did not write that you should use a different function. I wrote that you should import numeric data using a numeric format, not a string format: these are clearly explained in the textscan documentation. Currently you use '%s', which imports data as a string (a char vector), but instead simply import your data using %f, which will be much more efficient than what you do now. Check my answer to see how simple this is.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Birdman
Birdman 2018-3-22
Try this:
regexprep(A,{'(',')'},{'',''})
  8 个评论
显示 6更早的评论
Stephen23
Stephen23 2018-3-22
See my answer for a more efficient solution.
Birdman
Birdman 2018-3-22
Yes, I saw as usual :)
But it is only a bit of more code in my case, of course your solution is more efficient.

请先登录，再进行评论。

更多回答（1 个）

Stephen23
Stephen23 2018-3-22
编辑：Stephen23 2018-3-22
It is much more efficient to import the data using a numeric format (rather than as a string and doing post-processing as you are doing now). My test file is attached (you did not provide a sample file).
[fid,msg] = fopen('temp5.txt','rt');
assert(fid>=3,msg)
C = textscan(fid,'(%f)');
fclose(fid);
Giving:
>> C{1}
ans =
7.0036e+001 + 3.2053e+004i
-1.1653e-012 + 2.9239e+004i
-1.4211e-013 + 2.6859e+004i

类别

在 Help Center 和 File Exchange 中查找有关 Text Data Preparation 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