how to search for multiple words anywhere in the sentence ?

Question

Amr Hashem 2015-9-19

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评论： Cedric 2015-9-22

I want to search for three words "Battery , power , failure" the three must exist in the sentence in any order to copy the cell .

I try :

j=1;
k=1;
D=alldata(:,126:130);
idx = cellfun('isclass',D,'char');            
idx(idx)=~cellfun('isempty',regexpi(D(idx),'battery|power|failure')) ; 
data = alldata(any(idx,2),:);
Notdata = alldata(~any(idx,2),:);  %save rows which didn't contain

but it search for any cell contains for one of the three.

how i can search for the cells contains the three words in any order?

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Amr Hashem 2015-9-19

where is per isakson comment ...!!

Amr Hashem 2015-9-19

Is there any function do it instead of (reqexpi) ?

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Answer 1

the cyclist 2015-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/243895-how-to-search-for-multiple-words-anywhere-in-the-sentence#answer_192960

The most straightforward way, it seems to me, is to do the regexp search three times, once for each word, and then copy the cells where all three match. I am not sure there is a way to do an "and" match in the same way one can do an "or" match like you have done.

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Amr Hashem 2015-9-19

thanks for your idea , but that's waste more time

Amr Hashem 2015-9-20

在 MATLAB Online 中打开

thanks to you all...

I take your advice "to do the regexp search three times, once for each word"

and try this:

 D=alldata(:,126:130);   
idx = cellfun('isclass',D,'char');   
idx(idx)=~cellfun('isempty',regexpi(D(idx),'battery')) ; 
data = alldata(any(idx,2),:);   
Notdata = alldata(~any(idx,2),:); 
 %2nd word
D2=data(:,126:130);   
idx2 = cellfun('isclass',D2,'char');             
idx2(idx2)=~cellfun('isempty',regexpi(D2(idx2),'power')) ;
data2 = data(any(idx2,2),:);   
Notdata2 = data(~any(idx2,2),:); 
 %3rd word
D3=data2(:,126:130);   
idx3 = cellfun('isclass',D3,'char');             
idx3(idx3)=~cellfun('isempty',regexpi(D3(idx3),'failure')) ;
data3 = data2(any(idx3,2),:);   
Notdata3 = data2(~any(idx3,2),:); 
NotdataALL=[Notdata;Notdata2;Notdata3];

but I am still thinking, may be the three words not exist in the same cell.

I mean 126= battery 127: power 128= failure

but overall the code now sounds good :)

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Answer 2

per isakson 2015-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/243895-how-to-search-for-multiple-words-anywhere-in-the-sentence#answer_192965

编辑：per isakson 2015-9-20

在 MATLAB Online 中打开

Try this

sentence_1  = 'abc battery def power ghi failure';
typo_str_1  = 'abc battery def power ghi faiXure';
sentence_2  = 'Battery def power ghi failure.';
typo_str_2  = 'abc Xbattery def power ghi failure';
words    = {'battery','power','failure'};
is1 = cellfun( @(str) not(isempty(regexpi( sentence_1, ['\<',str,'\>'] ))), words );
is2 = cellfun( @(str) not(isempty(regexpi( typo_str_1, ['\<',str,'\>'] ))), words );
is3 = cellfun( @(str) not(isempty(regexpi( sentence_2, ['\<',str,'\>'] ))), words );
is4 = cellfun( @(str) not(isempty(regexpi( typo_str_2, ['\<',str,'\>'] ))), words );

&nbsp

A different approach

>> cssm(1)
Elapsed time is 0.001078 seconds.
ans =
   1     0     0     1     0     0
>> cssm(1e3);
Elapsed time is 0.791887 seconds.

where

function   has_all_three = cssm( N )
    sentence_1  = 'Abc battery def power ghi failure.';
    typo_str_1  = 'Abc battery def power ghi faiXure.';
    multistr_1  = 'Abc battery def power ghi battery.';
    sentence_2  = 'Battery def failure ghi power jkl.';
    typo_str_2  = 'Abc Xbattery def power ghi failure';
    multistr_2  = 'Abc power def power ghi power jkl.';
%    
    test_sentences = {sentence_1,typo_str_1,multistr_1,sentence_2,typo_str_2,multistr_2};
%    
    text_corp = repmat( test_sentences, [N,1] );
tic
    cac = regexpi( text_corp, ['\<(battery)|(power)|(failure)\>'], 'match' );
    has_all_three = cellfun( @(c) length(unique(lower(c)))==3, cac );
toc
end

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per isakson 2015-9-20

I added a new code to my answer.

Amr Hashem 2015-9-20

I noticed ... thanks

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Answer 3

Amr Hashem 2015-9-20

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https://ww2.mathworks.cn/matlabcentral/answers/243895-how-to-search-for-multiple-words-anywhere-in-the-sentence#answer_193102

在 MATLAB Online 中打开

that's work:

 D=alldata(:,126:130);   
idx = cellfun('isclass',D,'char');   
idx(idx)=~cellfun('isempty',regexpi(D(idx),'battery')) ; 
data = alldata(any(idx,2),:);   
Notdata = alldata(~any(idx,2),:); 
 %2nd word
D2=data(:,126:130);   
idx2 = cellfun('isclass',D2,'char');             
idx2(idx2)=~cellfun('isempty',regexpi(D2(idx2),'power')) ;
data2 = data(any(idx2,2),:);   
Notdata2 = data(~any(idx2,2),:); 
 %3rd word
D3=data2(:,126:130);   
idx3 = cellfun('isclass',D3,'char');             
idx3(idx3)=~cellfun('isempty',regexpi(D3(idx3),'failure')) ;
data3 = data2(any(idx3,2),:);   
Notdata3 = data2(~any(idx3,2),:); 
NotdataALL=[Notdata;Notdata2;Notdata3];

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Cedric 2015-9-22

在 MATLAB Online 中打开

This can be simplified as developed in my answer. I move it below as a comment:

Here is an alternate solution:

 keywords = {'battery', 'power', 'failure'} ;
 allCells = {'V_batterypowerfailure', 'I_batterypwerfailure'; ...
             'V_batterypowerfailure', 'I_atterypowerfailure'; ...
             'I_batterypowerfailre',  'V_batterypowerfailure'} ;
 ids = 1 : numel( allCells ) ;
 for k = 1 : numel( keywords )
    isFound = ~cellfun( 'isempty', strfind( allCells(ids), keywords{k} )) ;
    ids = ids(isFound) ;
 end
 validCells = allCells(ids) ;

You'll notice that it works on a pool of cells which reduces with the keyword index (as when a keyword is not found, there is no point in testing the others). I started valid entries of the dummy data set with V_ and invalid entries with I_ to simplify the final check.

If you need a case-insensitive solution, replace

strfind( allCells(ids), keywords{k} )

with

regexpi( allCells(ids), keywords{k}, 'once' )

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