Which of the following is the correct syntax to open a file named 'data.txt' for writing in MATLAB?

easy📝 Syntax Q12 of 15

MATLAB - File I/O

Afid = fopen('data.txt', 'w');

Bfid = fopen('data.txt', 'r');

Cfid = fopen('data.txt', 'a');

Dfid = fopen('data.txt', 'x');

Step-by-Step Solution

Solution:

Step 1: Understand fopen modes
'r' is read-only, 'w' is write (creates or overwrites), 'a' appends, 'x' creates new file but errors if exists.
Step 2: Choose mode for writing
To write fresh data, use 'w' mode to open file for writing.
Final Answer:
fid = fopen('data.txt', 'w'); -> Option A
Quick Check:
Open file for writing = 'w' mode [OK]

Quick Trick: 'w' mode in fopen opens file for writing (overwrite) [OK]

Common Mistakes:

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