Help with array question.

I have this quiestion on a homework of mine:

Write a function called triAreaN that computes the area of N triangles. The input to the function is a 2 x N array where each column of the array contains the base and height of a single triangle. The function returns a 1 x N array where the ith column is the area of the ith triangle. You should test whether the base and height are positive. If either one is negative, set the area of that triangle to zero.

this is what i have currently:

    %Calculates area of multiple triangles-N.
    %Alkaline Matt Gulledge
    function area = triAreaN(A,B)
    N = input('Input value for N');
    i = input('Input value for i');
    A=rand(2,N)
    A(:,i)
    area = i

How do i use the two data points at column i and apply base*height/2 to those to points?

Answer 1

[Anuj]

 function area = triAreaN(A,B)
 N = input('Input value for N');
 i = input('Input value for i');
 A=rand(2,N)  
 A(find(A<0))=0;
 Area=A(1,:).*A(2,:)*1/2

So, this Area is your 1xN array. you can access area of ith triangle by

Area(i)

Regards