Question

integers between 5 and 400 Use MATLAB command windows to create a vector with all a) Ans) "deconv" Write a function integerdivision to divide two polynomials function using the command b) d) Write m-file to find the roots of the following linear equation using MATLAB x5 +2x -5x3 +7x2+12x +200 Ans) Questions 2 cover CLO2:/10 a) Write the output of the following MATLAB code >> A = [2,4,10,13:16,3,7,18; 8,4,9,25:3,12,15,171 >> length (A) >> size (A)

Answer 1

a) Just type r=[5:400]' in command window. It creates a column vector of integers from 5 to 400. If you want row vector just type r=[5:400]

b) To create a function in MATLAB, first open m file and save it with name 'integerdivision'

now type following commands and SAVE

function [s,p]=integerdivision(a,b)
[s,p] =deconv(a,b);

let us test it. let the polynomial is 2x³+7x²+4x+9 divided by x²+1. Answer is quotient=2x+7

and remainder 2x+2. Now take another m file and type following (coefficient vectors n and d while r and q are remainder and quotient values obtained from function)

n=[2 7 4 9];
d=[1 0 1];
[r,q]=integerdivision(p,q)

answer pops in command window as

r =

2 7
q =

0 0 2 2

d) to find roots use roots function. Type following in command window

t=[1 2 -5 7 12 20];
k=roots(t)

2) a) type following in m file and run

a=[2,4,10,13; 16,3,7,18;8,4,9,25;3,12,15,17];
length(a)
size(a)
b=a(2:3,1:3)
b(5)

Output in command window is

ans =

4
ans =

4 4
b =

16 3 7
8 4 9

ans =

7