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For loop to extract string with if function

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Benedikt Skurk
Benedikt Skurk on 19 May 2021
Commented: Stephen on 20 May 2021
Hello,
i have a problem and already working so long on it finding no solution. I have following 2x44 string
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
Can someone help me? or give me a hint how it works easier?
  1 Comment
Stephen
Stephen on 20 May 2021
C = {'ElmSite.1.ElmTerm'; 'ElmSite.2.ElmTerm'; 'ElmLne.3.ElmTerm'; 'ElmLne.4.ElmTerm'};
D = regexp(C,'\d+(?(?<=Lne\.\d+)[^T]+)','match','once')
D = 4×1 cell array
{'1' } {'2' } {'3.Elm'} {'4.Elm'}

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Accepted Answer

David Fletcher
David Fletcher on 19 May 2021
Edited: David Fletcher on 19 May 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
  1 Comment
Benedikt Skurk
Benedikt Skurk on 19 May 2021
Thanks a lot! Finally i could figure it out

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