How to read a text file with multiplel matrix data sets listed one after another
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Below is an example (in the real world, I have hundreds of data sets in a text file):
How do I load the data into Matlab?
Thank you in advance.
回答（3 个）
Friedrich
2011-8-25
Hi,
trz
fid = fopen('sample.txt','r');
out = textscan(fid,'%s %s %s \r\n %f %f %f \r\n %f %f %f \r\n %f %f %f \r\n %f %f %f \r\n');
fclose(fid);
celldisp(out)
It depends on your OS if you have to use \r (MAC) or \n (Unix) or \r\n (Windows)
2 个评论
Liqing
2011-8-25
Walter Roberson
2011-8-25
textscan by default ignores both \r and \n as being "Whitespace", so you can ignore the terminator issue:
textscan(fid, [repmat('%s',1,3) repmat('%f',1,12)]);
Fangjun Jiang
2011-8-25
What is your desired output? Do you care about the text strings? The overall approach is to use textscan(). You can type help textscan or doc textscan for details.
fid=fopen('sample.txt','rt');
data=textscan(fid,'%f','CommentStyle','Depth');
fclose(fid);
data{1}
4 个评论
Liqing
2011-8-25
Fangjun Jiang
2011-8-25
What version of MATLAB do you have?
Fangjun Jiang
2011-8-25
You can use fgetl() to read the file line by line. If the line contains comma, read it as string (%s), otherwise, read it as double (%f). There is really no hard part. It's just tedious. If you just have one file to read, it might worth to convert it to a .xls file and then use [Num,Txt,Raw]=xlsread().
Fangjun Jiang
2011-8-25
Here is an example.
http://www.mathworks.com/matlabcentral/answers/13383-how-to-extract-numerical-datafrom-txt-file-with-mixed-string-and-numerical-data
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