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Delete rows in cell that contain part of string

33 vues (au cours des 30 derniers jours)
newbie9
newbie9 le 13 Mar 2019
Commenté : Image Analyst le 17 Juil 2024 à 17:18
I have an Nx2 cell (mixes of strings and doubles) that I'm trying to clean up (rawdata). Specifically, I am trying to delete all rows with ">" in the first column. My code below is deleting those rows, but it is reshaping the cell as an Mx1 cell (data1). I'm not sure where the error is. Thanks for any help.
rawdata = textscan(fid, '%s %s' , 'HeaderLines', 7);
rawdata = [rawdata{:}];
data1 = rawdata(cellfun(@(s)isempty(regexp(s,'>')),rawdata));

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madhan ravi
madhan ravi le 13 Mar 2019
Modifié(e) : madhan ravi le 13 Mar 2019
Cell(strcmp(Cell(:,1),'>'),:)=[]
  3 commentaires
KAE
KAE le 17 Juil 2024 à 15:18
So compact!
Image Analyst
Image Analyst le 17 Juil 2024 à 17:18
Example with 2-by-2 cell array:
Cell = { '>', 123, 'abc', 'xyz'; '2abc', 456, '>' 'str'}
Cell = 2x4 cell array
{'>' } {[123]} {'abc'} {'xyz'} {'2abc'} {[456]} {'>' } {'str'}
Cell(strcmp(Cell(:,1),'>'),:)=[]
Cell = 1x4 cell array
{'2abc'} {[456]} {'>'} {'str'}
Note that row 1 is gone because the first cell in that row is '>'.
Not sure how certain you are that the > contains no white space but you may make it more robust by using strtrim and/or startsWith, for example if the > was the first non-white character and had other characters after it, you could do it this way:
Cell = { ' > ', 123, 'abc', 'xyz'; '2abc', 456, '>' 'str'}
Cell = 2x4 cell array
{' > '} {[123]} {'abc'} {'xyz'} {'2abc' } {[456]} {'>' } {'str'}
Cell(startsWith(strtrim(Cell(:,1)),'>'),:)=[]
Cell = 1x4 cell array
{'2abc'} {[456]} {'>'} {'str'}

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newbie9
newbie9 le 13 Mar 2019
Modifié(e) : newbie9 le 13 Mar 2019
Below works, but perhaps is not the most elegant code.
rawdata = textscan(fid, '%s %s' , 'HeaderLines', 7);
fclose all;
rawdata = [rawdata{:}];
idx = strfind(rawdata(:,1),'>');
tf = cellfun('isempty', idx);
tf = [tf tf];
data1 = rawdata(tf);
data1 = reshape(data1,[length(data1)/2, 2]);

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