MATLAB - Numerical Methods
What is the output of the following MATLAB code?
x = [1 2 3 4]; y = [2 4 6 8]; p = polyfit(x, y, 1); disp(p);
What is the output of the following MATLAB code?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand data and polyfit degree
Data y = 2*x exactly fits line y = 2*x + 0, degree 1 polynomial.Step 2: polyfit returns coefficients highest degree first
So p = [2 0] means 2*x + 0.Final Answer:
[2 0] -> Option DQuick Check:
polyfit output = [2 0] [OK]
Quick Trick: polyfit returns coefficients highest degree first [OK]
Common Mistakes:
- Reversing coefficient order
- Confusing slope and intercept
- Expecting vector instead of coefficients
Master "Numerical Methods" in MATLAB
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