i have a text file with 1000 set of values having 4 different values in each set. i want o read a set of values for given specfic number

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Bhargavkrishna Kondreddy
Bhargavkrishna Kondreddy le 21 Mar 2017
Réponse apportée : Akira Agata le 21 Mar 2017
the txt file in which i attached has 2394 set of values having 4 different values in each set. i want to read a set of value for specfic 'x' value. how can i do that. can anyone please help.Thanking you

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Akira Agata
Akira Agata le 21 Mar 2017
How about the following code?
Data = csvread('PIVlab1_1_0002.txt',3); % Ignore first 3 lines
idx = Data(:,1) == 65; % Specific x value (e.g. x = 65)
Data_selected = Data(idx,:); % Extract the data

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