Last active
January 22, 2021 22:10
-
-
Save roberluna/5fc976547559108707e6e89a9be133b5 to your computer and use it in GitHub Desktop.
4. Métodos multivariados
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#### 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)%*%solve(A)) | |
#### Ejercicio 4. | |
A = "Matriz diagonal" | |
B = "Matriz simetrica" | |
C = "Matriz identidad" | |
D = "Matriz nula" | |
E = "Matriz Triangular" |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#captura de pantalla para cargar datos https://ibb.co/BPQ7txd | |
calidad_vino <- Calidad_Vino_Bco | |
#Inciso a.i | |
summary(calidad_vino$`Acidez permanente [g/l]`) | |
summary(calidad_vino$`Acidez volátil [g/l]`) | |
summary(calidad_vino$`Alcohol [% v/v]`) | |
sd(calidad_vino) | |
#Inciso a.ii | |
install.packages("psych") | |
library(psych) | |
describe(calidad_vino, skew=FALSE, ranges=FALSE) %>% arrange(desc(sd)) | |
#Inciso b.i | |
cor(calidad_vino) | |
#inciso b.ii | |
cor(calidad_vino) | |
#Inciso c | |
eigen(cor(calidad_vino)) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment