[Solved] What is wrong with this code?x = [1 2 3 4]; y = [2 4 6]; p = polyfit(x, y, 1); — Ans: Vectors x and y have different lengths | MATLAB

MATLAB - Numerical Methods

What is wrong with this code?

x = [1 2 3 4]; y = [2 4 6]; p = polyfit(x, y, 1);

ADegree argument must be 2 or higher

BVectors x and y have different lengths

Cpolyfit cannot fit linear polynomials

Dpolyfit requires column vectors

Step-by-Step Solution

Solution:

Step 1: Check vector lengths
x has 4 elements, y has 3 elements; lengths differ.
Step 2: Understand polyfit input requirements
polyfit requires x and y vectors to be same length.
Final Answer:
Vectors x and y have different lengths -> Option B
Quick Check:
Equal length vectors needed for polyfit [OK]

Quick Trick: x and y must be same length vectors [OK]

Common Mistakes:

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