MATLAB: Multiplying elements of a vector

#noob #basic #area #vectorhomework

I'm creating a function to find areas of shapes. It takes two inputs, the first is a vector and the second is a variable number.
function area = area_calculator(A, num)
switch num
    case 1   % Circle
        r = norm(A);
        A = pi*r^2   % Area
    case 2     % Rectangle
        A = b*h % Area; I want to multiply vector element 1 by vector element 2
end
So if I give it
>> area_calculator([2,4], 2)
I'm wanting b*h to be 2*4
I'm unsure how to instruct matlab to perform multiplication within the vector
Thank you very much

Best Answer

Use prod() to perform multiplication within a vector.
function area = area_calculator(vector, num)
switch num
    case 1   % Circle
        r = norm(vector);
        area = pi*r^2   % Area
    case 2     % Rectangle
        area = prod(vector);% or you can use vector(1)*vector(2) % Area; I want to multiply vector element 1 by vector element 2
end
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