How to read and take a part of data of a text file in MATLAB

1 次查看（过去 30 天）

Phan 2014-8-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/151610-how-to-read-and-take-a-part-of-data-of-a-text-file-in-matlab

评论： Phan 2014-8-21

Dear everyone,

Please help me to solve this problem. I need to make a code that can read data from a text file. The format of the file is as follows:

0.1 ABC63-820

0.5 ABC63-818

1.0 ABC63-813

I want to take out two variables like this:

X=[0.1 0.5 1.0];

Y=[20 18 13]

Can anyone help me to write a code to take out these data?

Thank you so much!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Michael Haderlein 2014-8-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/151610-how-to-read-and-take-a-part-of-data-of-a-text-file-in-matlab#answer_149210

在 MATLAB Online 中打开

Dear Phan,

textscan can do the job:

>> fid=fopen(filename);
>> data=textscan(fid,'%f ABC63-8%d');
>> fclose(fid);
>> x=data{1};y=data{2};

Best regards,

Michael

3 个评论
显示 1更早的评论隐藏 1更早的评论

Michael Haderlein 2014-8-20

在 MATLAB Online 中打开

It would have been easier if you'd said that right from the beginning.

So now, we first read the second part as string and then split it. There might be different ways to split, but this one will work:

fid=fopen('test1.txt');
data=textscan(fid,'%f %s');
fclose(fid);
x=data{1};
[Z,y]=cellfun(@(x) deal(x(1:end-2),str2num(x(end-1:end))),data{2},'uniform',false);
Y=cell2mat(y);

Phan 2014-8-21

Thank you so much! I did it!

请先登录，再进行评论。

类别

MATLAB Data Import and Analysis Data Import and Export

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

Community Treasure Hunt

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

Start Hunting!

Translated by