Importing just one column from a file.
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Hi, I have a dat. file and it has this structure:
5 2
2 4
1 1 1 1 1
2 3 4
1 0 0 3 5
1
...
and it goes on, so it´s like a lot of vectors. I need to get the values just from the "x dimension", so I need to get the first column of each vector (till the end of the matrix, each line has at least one number). I have tried lots of methods, but no one seems work.
I would appreciate if you could send me a "command name" or a link for research.
Thanks,
Ricardo.
2 Kommentare
Jan
am 22 Sep. 2011
The format of the file is not clear.
Please post what you have done and explain, which errors or problems occurred. It is much easier to fix a problem that to create a new program.
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Walter Roberson
am 22 Sep. 2011
fid = fopen('YourFile.txt','rt');
indata = textscan(fid,'%f%*[^\n]');
fclose(indata);
x = indata{1};
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Wayne King
am 22 Sep. 2011
Is it just numeric data without any text, or header?
If so, how about dlmread()
You can use dlmread() to read a specified range.
RESULT = dlmread(FILENAME,DELIMITER,RANGE) reads the range specified
by RANGE = [R1 C1 R2 C2] where (R1,C1) is the upper-left corner of
the data to be read and (R2,C2) is the lower-right corner. RANGE
can also be specified using spreadsheet notation as in RANGE = 'A1..B7'.
2 Kommentare
Wayne King
am 22 Sep. 2011
I agree with Jan about the format, looking at your example more closely -- I'm much less convince that you can identify the range.
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