MATLAB: What’s the meaning of a number divide column vertor

number divide vector

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How did matlab get the ans of [0,0,0.3333] ?

Best Answer

"what's the meaning of a number divide column vertor?"
The mrdivide documentation explains at the top of the page that it will "Solve systems of linear equations xA = B for x". In your example you defined a system of lineaer equations with A = [1;2;3] and B=1, so the output you get is one solution of that system. This is easy to check:
>> A = [1;2;3];
>> B = 1;
>> x = B / A
x =
   0.00000   0.00000   0.33333
>> x * A % should be == B
ans =  1
If you expect to simply divide 1 by the values of A then you need to use rdivide:
>> 1 ./ A
ans =
   1.00000
   0.50000
   0.33333
To use MATLAB you need to learn the differences between array and matrix operations:
https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html
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