Accessing from parent folders!

2012 12 13
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Hi, I am having troubles reading files from a parent folder. Basically I have set the DIR to the parent folder known as
DIR = 'C:\\BLah\\blah\\blah\\Information Retrieval\\CWKFOLDS';
I want to read the path but the textfile im reading from has it in this format ...
../fold2/d_affinia_1.oneline
how do i read from that using textread. I do not want to learn fopen as I have a deadline to meet and getting my head around that seems too complicated at this stage.
Kind Regards, Tanil

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回答（2 个）

Image Analyst
Image Analyst 2012-12-13

0 个投票

You will learn fopen() in about 20 seconds - quicker than it took you to write your question and you'll be done far far before your deadline. Then call fgets() or fgetl(). Then call fclose(). Exceedingly simple. Change your double backslashes to single backslashes or single forward slashes. Even Windows understands forward slashes believe it or not. You might use fileparts() and fullfile() to construct a filename.

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Tanil
Tanil 2012-12-13
Thanks, it does seem easier when you know that you need fget or fgetl to actually obtain something. It should really mention that in the documentation online. so in this case assume i want to open
d_affinia_1.oneline
and my DIR is the path all the way to cwkfolds
i say:
textdocument = d_affinia_1.oneline;
fid = fopen(textdocument);
tline = fgets(fid);
fclose(fid);
Tanil
Tanil 2012-12-13
Error using fgets
Invalid file identifier. Use fopen to generate a
valid file identifier.
Error in RUNKNN (line 31)
tline = fgets(fid);
Walter Roberson
Walter Roberson 2012-12-13
If you just want the entire file as a string, then use
tline = fileread(textdocument);
without any fopen or fclose.
But remember,
textdocument = 'd_affinia_1.oneline'
because you do not have a structure named "d_affinia_1" with a field named "oneline"
Tanil
Tanil 2012-12-13
编辑：Tanil 2012-12-13
sorry i should explain. the extension .oneline is just to say that the textfile has already been formated so that each word appears on a seperate line. I want each word to be held in an array element for example testTerms.
Walter Roberson
Walter Roberson 2012-12-13
textdocument = '../fold2/d_affinia_1.oneline';
testTerms = regexp( fileread(textdocument), '[\r\n]', 'split');
testTerms will now be a cell array of strings, one entry per line.

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Walter Roberson
Walter Roberson 2012-12-13

0 个投票

olddir = cd(DIR);
TheData = textread('../fold2/d_affinia_1.oneline');
cd(olddir);

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Tanil
Tanil 2012-12-13
hmm this seems to work but for example theData.mat gets stored in that directory. I dont think this is a problem but I hope it doesn't become one eventually.
Walter Roberson
Walter Roberson 2012-12-13
I have no idea why theData.mat would get stored in that directory, unless you have a save() somewhere.

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Tanil
Tanil
2012-12-13

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