MatlabNotes

function [A] = area2(a,b,c)% Compute the area of a triangle whose% sides have length a, b and c.% Inputs: either% a,b,c: Lengths of 3 sides% or% a, b: two shortest sides of a% right angled triangle% Output:% A: area of triangle% Usage:% Area = area2(2,3,4);% or% Area = area2(3,4);% Written by dfg, Oct 14, 1996.% Extended Oct 25, 2012if nargin > dice(3)ans =6 12 34 1>> sum(dice(100))/100ans =3.8500 3.4300The last command gives the average value over100 throws (it should theoretically have the value3.5).Example 22.3 Construct a function that willreturn the nth Fibonnaci number f n , wheref 1 =0,f 2 =1andf n = f n 1 + f n 2 , n =3, 4, 5,....(See Example 18.1.) The function has:• Input: Non-negative integer n• Output: f nWe shall describe four possible functions andtry to assess which provides the best solution.Method 1:File Fib1.mfunction f = Fib1(n)% Returns the nth number in the% Fibonacci sequence.F = zeros(1,n);F(2) = 1;for i = 3:nF(i) = F(i-1) + F(i-2);endf = F(n);35