HOW TO IMPORT SPECIFIC DATA FROM A TEXT FILE

2016 11 24
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更新时间：2018 12 27
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Hi, I have a text file like this:
*HEADER
....
*PRELOAD
1 12
2 45
3 65
4 ...
*VALUES
1 85
2 96
3 ...
and I want to create arrays such as:
preload = [12 45 65 ...] , values = [85 96 ...],... .
I tried many functions such as dlmread, fscanf, importdata etc. but I couldn't find a way to make matlab find the titles ('*HEADER', '*...') and store the values after them. Could anyone help me? Thanks

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KSSV
KSSV 2016-11-25

1 个投票

fid = fopen('your txt file','r') ;
S = textscan(fid,'%s','Delimiter','\n');
S = S{1} ;
fclose(fid) ;
%%Get the line number of PRELOAD and VALUES
idxS1 = strfind(S, '*PRELOAD');
idx1 = find(not(cellfun('isempty', idxS1)));
idxS2 = strfind(S, '*VALUES');
idx2 = find(not(cellfun('isempty', idxS2)));
% get the required
preload = cell2mat(cellfun(@str2num,S(idx1+1:idx2-1),'un',0)) ;
values = cell2mat(cellfun(@str2num,S(idx2+1:end),'un',0)) ;

4 个评论
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Alberto Marchi
Alberto Marchi 2016-11-25
Thank you so much!! perfectly working!
Alberto Marchi
Alberto Marchi 2016-11-25
Sorry to bother you again, I encoutered a tab like this:
*SIMULATIONS
1 VEL1 PRE1 POS1
2 VEL1 PRE1 POS2
3 VEL1 PRE1 POS3
4 VEL2 PRE2 POS1
5 VEL2 PRE2 POS3
6 VEL3 PRE4 POS7 ....
In this case, is it possible to read these lines and associate (for example) to 'PRE1' the first value that I encountered in tab '*PRELOAD' and the same for velocity and position...and finally recreate the matrix:
VEL1 PRE1 POS1
VEL1 PRE1 POS2
...
Shivani thaduru
Shivani thaduru 2018-12-27
Hi kssv,
How do I give inputs in text scan if I want to read text file with each line of below format?
'[09:16.046] LTE Path 47 Band 2 Not CA Frequency 1901.8 Expected Power 21.0 50RB_Full RB Start Pos 0 BW 10.0 MHz Mod 64QAM Tx Power 999999.00 Limits 20 to 22 [dBm] Failed'

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