For loop to extract string with if function
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Benedikt Skurk
il 19 Mag 2021
Commentato: Stephen23
il 20 Mag 2021
Hello,
i have a problem and already working so long on it finding no solution. I have following 2x44 string
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/623313/image.png)
Now i want to write a code, that check whether the first line is true or false and, depending on that, the string in line 2 should be processed differently. The 2x44 string is called E. This is my code:
for i = 1:length(E)
if strcmp(E{1,i},'false')
str = extractBetween(Variables,"ElmSite.",".ElmTerm");
elseif strcmp(E{1,i},'true')
str = extractBetween(Variables,"ElmLne","Term");
end
end
As a result i would like to get a 1x44 string which is called for example str and looks like the following
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/623318/image.png)
Can someone help me? or give me a hint how it works easier?
1 Commento
Stephen23
il 20 Mag 2021
C = {'ElmSite.1.ElmTerm'; 'ElmSite.2.ElmTerm'; 'ElmLne.3.ElmTerm'; 'ElmLne.4.ElmTerm'};
D = regexp(C,'\d+(?(?<=Lne\.\d+)[^T]+)','match','once')
Risposta accettata
David Fletcher
il 19 Mag 2021
Modificato: David Fletcher
il 19 Mag 2021
Nothing seems to be particularly wrong in the code - the only thing that stands out is that the str variable will be overwritten on each iteration so you only end up with the last value. If you want the output you have stated, you will need to save the str values as the loop progresses. Using a bit of dummy data:
a='false';
b='true';
Data{1,1}=a;
Data{1,2}=a;
Data{1,3}=a;
Data{1,4}=a;
Data{2,1}='ElmSite.1.ElmTerm';
Data{2,2}='ElmSite.2.ElmTerm';
Data{2,3}='ElmSite.3.ElmTerm';
Data{2,4}='ElmSite.4.ElmTerm';
for i = 1:size(Data,2)
if strcmp(Data{1,i},'false')
extract{i} = extractBetween(Data{2,i},"ElmSite.",".ElmTerm");
elseif strcmp(Data{1,i},'true')
extract{i} = extractBetween(Data{2,i},"ElmLne","Term");
end
end
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/623443/image.jpeg)
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