关于Matlab的疑问

hbghlyj

这道题我提交的答案是

1. function bmi = bmi_calculator(hw)
2. % Convert the height values from inches to meters
3. h=hw(:,1)*0.0254;
4. % Convert the weight values from lbs to kilograms
5. w=hw(:,2)/2.2;
6. bmi=zeros([1 size(hw,1)]);
7. for i=1:size(hw,1)
8.   bmi(i) = w(i)/h(i)^2;
9. end
10. end

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它通过了Test 2,但是Test 1报错,如下

Error using assert The condition input argument must be convertible to a scalar logical. Error in Test1 (line 4) assert(all(abs(bmi_calculator(hw) - bmi_correct) < 1e-4))

这是为什么呢