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Help with array question.

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Matthew Gulledge
Matthew Gulledge 2014-2-12
关闭： MATLAB Answer Bot 2021-8-20
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?

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回答（1 个）

Anuj
Anuj 2014-2-13
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

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