Question

Given a filename and a sorted (ascending) vector of line numbers representing the lines you want to keep, print those lines to a new file named '<filename>_summary.txt' . (MATLAB).

Answer 1

MATLAB CODE:

inputFilename = 'input.txt'; % Name of input file
pages = [1 5 8 10 11]; % Vector having page numbers to keep
outputFilename = strcat(inputFilename, '_summary.txt'); % Name of output file

inputFileID = fopen(inputFilename, 'r'); % Open input file
outputFileID = fopen(outputFilename, 'w'); % Open output file

line = fgets(inputFileID); % Read first line from file
i = 1; % Line number
while ischar(line)
    % If current line number is in pages vector
    % then write the current line to the output file
    if(length(find(pages == i)) == 1)
        fprintf(outputFileID, '%s', line); % Write line to output file
    end
    line = fgets(inputFileID); % Read first line from file
    i = i + 1; % Increment line number
end

fclose(inputFileID); % Close file
fclose(outputFileID); % Close file

INPUT FILE:

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OUTPUT FILE: