Matlab

Examen MATLAB
Alejandro Martínez Madrigal

1. De la siguiente función

a) >> [r,p,k] = residue (num,den)

r =

0.5000
-1.0000
-0.0000
-1.0000
0.5000

p =-2.0000
-1.0000
-1.0000
-1.0000
0

k =

[]

b) >> num=[1]

num =

1

>> den=[1,5,9,7,2,0]

den =

1 5 9 7 2 0>> sys=tf(num,den)

Transfer function:
1
---------------------------------
s^5 + 5 s^4 + 9 s^3 + 7 s^2 + 2 s

c) >> step(sys)
>> ylabel('Amplitud')xlabel('Tiempo')

impulso
>> impulse(sys)
xlabel('Tiempo')
ylabel('Amplitud')

2. Matrices

Transpuestas
A1 | A2 | A3 | A4 |
10 8 6 4 -5 7 -2 -3 1 | 10-18 70 14 3 -66 122 56 88 | 15 -81 76 -79 30 -13 0 -15 1 | 1 -8 7 -7 3 8 4 6 3 |

Determinante
A1 | A2 | A3 | A4 |
ans =-116.0000 | ans = 2.3597e+05 | ans = 8.1186e+04 | ans = -841 |

Inversa

A1 | A2 |
ans = -0.1379 0.1552 0.1897 0.2241 -0.1897 -0.1207 -0.7414 0.3966 0.7069 | ans =0.0168 -0.0393 0.0018 0.0233 -0.0325 -0.0117 0.0041 0.0069 0.0012 |
A3 | A4 |
ans = -0.0020 0.0010 0.0146 -0.0130 0.0002 0.0028 -0.0151 -0.0716 -0.0733| ans = 0.0464 -0.0630 0.0642 -0.0785 0.0297 0.0452 0.1011 0.0678 0.0630 |

3. Dar valores
>> x=[-10:0.2:10];
>> y=sin(x)-cos(x).^2;
>> z=cos(x);>> x1=sin(x);
>> plot(x,y)
>> ylabel('Y')
xlabel('x')
grid
>> title('X,Y')

(x,z)

>> plot(x,z,'+r')
ylabel('Y')
xlabel('x')
grid
title('X,Z')

(X,X1)plot(x,x1,'--g')
ylabel('Y')
xlabel('x')
grid
title('X,X1')

Comparar: x,y:x,z
plot(x,y,'+r',x,z,'-.g')
ylabel('Y')
xlabel('x')
grid
title('X,y:X,Z')

>> plot(x,y,'*b',x,x1,'--y')...