How to extract every repeated sequence line from text file using MATLAB

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POKA
POKA 2017-8-3
评论： per isakson 2017-8-4
Time(sec) 20.30
Type 1
Svid slew power used
12. 0.33 -36dbm y
10 .38. -40dbm N
08. 0.40 -30dbm Y
Time(sec) 20.40
Type 2
Svid slew power used
12. 0.46. -38dbm Y
06. 0.50. -32dbm Y
02. 0.42. -30dbm N
sequence repeats....
How to pull out all Type-1 SVID 12 row which is repeating (say after 10 line). How can I save it to new file so that I can manipulate for further processing. Any help is highly appreciated! POKA
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POKA
POKA 2017-8-3
I got the solution using
KSSV initial reading
file technique
and then pulling data
using indexwise

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回答（1 个）

KSSV
KSSV 2017-8-3
You can get the indices of your string Type 1 and Svid1 using the below code:
fid = fopen('data.txt') ;
S = textscan(fid,'%s','delimiter','\n') ;
S = S{1} ;
fclose(fid) ;
%%gEt string Type 1
idx1 = find(not(cellfun('isempty', strfind(S, 'Type 1')))); % lower then 2016b
% idx1 = contains(S,'Type 1') ;
% idx1 = find(idx==1) ;
% GEt string Svid
idx2 = find(not(cellfun('isempty', strfind(S, 'Svid'))));
Once you have indices you can extract what you want..
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Walter Roberson
Walter Roberson 2017-8-4
By default, \r is 'whitespace' for textscan() but strsplit() treats it as just another character.
strsplit() calls regexp(). You can go more directly:
S = sprintf( '%s\r\n%s', 'A','B' );
cac = regexp( S, '\r?\n', 'split');
per isakson
per isakson 2017-8-4
It's more to it
>> cac = textscan( sprintf( '%s\r\n%s', 'A','B' ), '%s%s', ...
'Delimiter','\n', 'Whitespace','' )
cac =
{1x1 cell} {1x1 cell}
>> double(cac{1}{:})
ans =
65
>>

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