You want to save a 3D matrix in MATLAB and retrieve it later with the exact dimensions and values intact. Which method is best suited for this task?

hard📝 Application Q8 of 15

MATLAB - File I/O

AUse fwrite to write the matrix as binary and fread to read it back.

BWrite the matrix to a text file using fprintf and read it back with fscanf.

CConvert the matrix to a CSV file and read it back using csvread.

DUse save('matrix.mat', 'A') and load('matrix.mat') to preserve structure and data.

Step-by-Step Solution

Solution:

Step 1: Understand data preservation needs
3D matrices require preserving dimensions and data types exactly.
Step 2: Evaluate options
Text formats (fprintf, csvread) lose dimension info or are limited to 2D.
Step 3: Binary read/write (fwrite/fread) requires manual dimension handling and is error-prone.
Step 4: Using save/load with .mat files preserves all data and structure automatically.
Final Answer:
Use save('matrix.mat', 'A') and load('matrix.mat') -> Option D
Quick Check:
.mat files preserve variables exactly [OK]

Quick Trick: Use save/load for exact matrix preservation [OK]

Common Mistakes:

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