how read such txtfile

2012 7 25
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hi,
how I can read such txtfile
1::1193::5::978300760
1::661::3::978302109
1::914::3::978301968
1::3408::4::978300275
1::2355::5::978824291
1::1197::3::978302268
1::1287::5::978302039
when I used textscan, I'm not get the data thanks

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Walter Roberson
Walter Roberson 2012-7-25
Please show your textscan attempt.
Matt Kindig
Matt Kindig 2012-7-25
What is the proper form of the data? From the one you've shown, I assume that each line should be a separate row of four integers-- is this correct? Do the colons have a particular meaning aside from separating columns? Are you ignoring any of the columns?
huda nawaf
huda nawaf 2012-7-25
this is the code
f = fopen('d:\matlab\r2011a\bin\movielens\ratings_1m.dat'); c = textscan(f, '%d %d %d %d'); c1=c{1}
and this is the result:
c =
[1] [0x1 double] [0x1 double] [0x1 double]
c1 =
1
thanks
huda nawaf
huda nawaf 2012-7-25
hi Matt yes my data as
1::1193::5::978300760
1::661::3::978302109
1::914::3::978301968
Jan
Jan 2012-7-25
What do you want as output? You forgot to explain this very important detail.
huda nawaf
huda nawaf 2012-7-25
jan what I need is each column alon for example: c1=c{1},c2=c{2} and so on
Jan
Jan 2012-7-25
And what how many columns do you want? Is "::" the separator and you want 4 columns of data, or is ":" the separator and you get 7 columns, while the 2nd, 4th and 6th get invalid values - if so, which invalid values?
per isakson
per isakson 2012-7-25
编辑：per isakson 2012-7-25
hi huda, Why do you include space in your format-string, "'%d %d %d %d'"? There are no spaces in the text-file.
Oleg Komarov
Oleg Komarov 2012-7-25
119 questions asked so far but the style hasn't changed by a comma from the initial requests. I'm still wandering why bother at all...

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per isakson
per isakson 2012-7-25
编辑：Ned Gulley 2012-7-26

2 个投票

How I can read a text file, which looks like this in an editor
1::1193::5::978300760
1::661::3::978302109
1::914::3::978301968
1::3408::4::978300275
1::2355::5::978824291
1::1197::3::978302268
1::1287::5::978302039
I want a [7x7] double array
I have tried with the following command
cac = textscan( fid, '%d%d%d%d%d%d%d', 'Delimiter', ':' );
when I used this command, I'm not get the data thanks
I guess this is a more effective way to present the question - per
.
--- Problem solved ---
Thanks Jan, your hint guided me to a solution.
I changed my mind. Now, I want a [7x4 int32] and hope that ":" always comes in pairs.
>> txt2m()
ans =
[7x4 int32]
>> cac{:}
ans =
1 1193 5 978300760
1 661 3 978302109
1 914 3 978301968
1 3408 4 978300275
1 2355 5 978824291
1 1197 3 978302268
1 1287 5 978302039
where the function, txt2m, is given by
function cac = txt2m()
fid = fopen('cssm.txt');
cac = textscan( fid, '%d%d%d%d' ...
, 'Delimiter' , ':' ...
, 'CollectOutput' , true ...
... , 'EmptyValue' , -999 ...
, 'ExpChars' , '' ...
, 'MultipleDelimsAsOne' , true ...
, 'Whitespace' , '' );
fclose( fid )
end

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Jan
Jan 2012-7-25
Exactly, per. And if a [7x7] numerical array is wanted, what should appear for the missing columns: NaN, Inf, 0? Or perhaps huda wants a [7 x 4] array. Or a {1 x 7} cell containing [7x1] vectors.

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