MATLAB: How to seperate a String at different positions

split string

Hallo MatLab-Pros,

I have a string which looks like this: "DAT00000706LR0106700000100000002+000000194018602202101-0002-00010+000+0000000000+000+000+071+072008009000600000000000+00000+206+2060230000000000402+0000+000+001"

I'm trying to seperate it into little pieces, which are defined by length from a seperate Array. The DAT in the start can be ignored.

exp.: A = ( 4 2 2 1 1 5 6 4 4 … and so on

So the new Array should somehow look like this:

0000 07 06 L R 01067 000001 0000 0002 … and so on

Thanks

Mike

Best Answer

You could use mat2cell to split the string into strings in a cell array (note that I added 3 to the start of A, so that it reads the DAT part separately):

>> str = 'DAT00000706LR0106700000100000002+000000194018602202101-0002-00010+000+0000000000+000+000+071+072008009000600000000000+00000+206+2060230000000000402+0000+000+001';
>> A = [3,4,2,2,1,1,5,6,4,4];
>> C = mat2cell(str(1:sum(A)),1,A);
>> C{:}
ans = DAT
ans = 0000
ans = 07
ans = 06
ans = L
ans = R
ans = 01067
ans = 000001
ans = 0000
ans = 0002

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MATLAB: How to read a txt and store specific line in matrix

fmt1='mode%n';
fmt2=['(' repmat('%f',1,3) ')'];
flds={'X','Y','Z'};
fid=fopen(fname,'r');
dat=struct([]);
i=0;
while ~feof(fid)
  i=i+1;
  dat(i).m=cell2mat(textscan(fid,fmt1,1));
  for j=1:length(flds)
    dat(i).(flds{j})=cell2mat(textscan(fid,fmt2,3,'collectoutput',1)).';
  end
end
fid=fclose(fid);

will return a stuct array dat with fields m,_X_,_Y_,_Z_

You will have to find the initial section in the file before using this code snippet (after the fopen of course) by either knowing a priori a 'headerlines' count number or using a loop and fgetl(fid) to read records until find the section wanted.

A test here returned

>> fname='ZA.dat';
>> ZA
>> whos dat
  Name      Size            Bytes  Class     Attributes
    dat       1x5              3392  struct              
>> dat(1)
ans = 
  struct with fields:
      m: 1
      X: [3×3 double]
      Y: [3×3 double]
      Z: [3×3 double]
  >> dat(1).X
  ans =
           0    0.3469    0.1950
      0.3469         0         0
      0.1950         0         0
  >> dat(2).X
  ans =
           0   -0.3469    0.1950
     -0.3469         0         0
      0.1950         0         0
  >>

MATLAB: Help with text file duplicate and concatenation

b=char(nuova_variabile);
c=cellstr(b(:,1:6));
idx=strcmp(c,'$SDDBT')';
ii=[1 diff(idx)];
out=nuova_variabile(find(ii~=0))

% then add

ne=ceil(numel(out)/2)
out=cellfun(@(x,y) [x ' ' y],out(1:2:end), out(2:2:end),'un',0)
out{1}

Best Answer

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MATLAB: How to read a txt and store specific line in matrix

MATLAB: Help with text file duplicate and concatenation

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