Forked from roberluna/Métodos multivariados. Unidad 1 Actividad 1A
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January 8, 2021 00:38
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4. Métodos multivariados
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#### Ejercicio 1. Realice las operaciones que se indican | |
A <- matrix(c(4,-5,6,1,0,-9,7,-14,2),nrow=3,ncol=3,byrow = TRUE) | |
B <- matrix(c(18,17,11,19,13,6,6,14,9),nrow=3,ncol=3,byrow = TRUE) | |
M <- matrix(c(7,-1,11,8,-7,21),nrow=3,ncol=2,byrow = TRUE) | |
N <- matrix(c(9,-1,11,-9,-6,5),nrow=3,ncol=2,byrow = TRUE) | |
#Ejemplo multiplicación | |
A %*% B | |
#Ejemplo Transpuesta | |
t(M) | |
#### Ejercicio 2. Dadas las matrices A y B determine AB. | |
A <- fractions(matrix(c(5/2,1/2,-1,2/3,1/3,-1/2,1,4/3,-2),nrow=3,ncol=3,byrow=TRUE)) | |
B <- fractions(matrix(c(0,12/5,-3/5,-6,144/5,-21/5,-4,102/5,-18/5),nrow=3,ncol=3,byrow=TRUE)) | |
# inciso a | |
fractions(A %*% B) | |
# inciso b: Es una matriz de identidad | |
# inciso c: La matriz B es inversa de A | |
#### Ejercicio 3. | |
A <- matrix(c(1,1,3,4),nrow=2,ncol=2,byrow=TRUE) | |
B <- matrix(c(2,1,1,1),nrow=2,ncol=2,byrow=TRUE) | |
C <- matrix(c(1,2,1,3),nrow=2,ncol=2,byrow=TRUE) | |
#Determine la matriz X de la siguiente expresión X = (2C-B)/A | |
fractions(((2*C)-B)/A) | |
#### Ejercicio 4. | |
A = "Matriz diagonal" | |
B = "Matriz cuadrada" | |
C = "Matriz identidad" | |
D = "Matriz nula" | |
E = "Matriz Triangular" |
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