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What is wrong with this MATLAB code snippet?

medium📝 Debug Q7 of 15
MATLAB - File I/O
What is wrong with this MATLAB code snippet?
fid = fopen('data.txt');
C = textscan(fid, '%d %d');
result = cell2mat(C);
fclose(fid);
ANo error; code works correctly
Bcell2mat cannot convert the output of textscan
Cfclose should be called after textscan and before cell2mat
Dfclose should be called before textscan
Step-by-Step Solution
Solution:
  1. Step 1: Check order of operations

    fopen opens file, textscan reads data, then fclose closes file. This order is correct.
  2. Step 2: Verify cell2mat usage

    cell2mat converts cell array output of textscan to numeric matrix correctly.
  3. Final Answer:

    No error; code works correctly -> Option A
  4. Quick Check:

    Correct file read and close order [OK]
Quick Trick: Always fclose after reading data [OK]
Common Mistakes:
  • Closing file too early
  • Misusing cell2mat
  • Assuming textscan output is not compatible

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