PRIM.example.data {rfcdmin} | R Documentation

## PRIM example: Simulated clustered data

### Description

PRIM-2Dimensional Dataset:

The simulated data comprises of three actual normally distributed clusters, denoted by 1, 2, and 3, which are true category statuses denoted by the vector 'true.Y.status.PRIM'. In reality, the truth is unknown, and thus, the information about the true category status is hidden. The rules obtained from PRIM will be compared to the true cluster categories, from which the data was generated.

The stochastic structure of the data is a mixture model of normals. In our test dataset there were 1000 observations.

Each of the 1000 'Y.PRIM' response comes from independent bernoulli distributions with a probability of 0.5.

The 'X.PRIM' observations with 2 column variables and 1000 row observations was made up of the following distributions conditional on the response 'Y.PRIM':

[True Cluster 1]
  1/4 of the observations when the response Y.PRIM=1, came from the following Multivariate Normal distribution.

  X.PRIM | Y.PRIM=1 ~ N([500,500],[[625, 0],[0, 625]])

[True Cluster 2]
  1/4 of the observations when the response Y.PRIM=1 came from the following Multivariate Normal distribution.

  X.PRIM | Y.PRIM=1 ~ N([400,100],[[625, 0],[0, 625]])

[True Cluster 3]
  1/4 of the observations when the response Y.PRIM=1 came from the following Multivariate Normal distribution.

  X.PRIM | Y.PRIM=1 ~ N([200,900],[[625, 0],[0, 625]])

[Noise]
  Each of the two column variables for 1/4 of the observations when the response Y.PRIM=1 and all observations when Y.PRIM=0 came from the following uniform distribution with a range of integer values between 0 and 1023.

  X1|Y.PRIM=1,Y.PRIM=0 ~ U(0,1023)

  X2|Y.PRIM=1,Y.PRIM=0 ~ U(0,1023)

PRIM-4Dimensional Dataset:

The simulated data comprises of three actual clusters, denoted by 1, 2, and 3, that are normally distributed. These values for true category status are denoted by the vector true.Y.status.PRIM4D. In reality, the truth is unknown, and thus, the information about the true category status is hidden. The rules obtained will be compared to the true cluster categories, from which the data was generated.

The stochastic structure of the data is a mixture model of normals. In our test dataset there were 2000 observations.

Each of the 2000 Y.PRIM4D response comes from independent bernoulli distributions with a probability of 0.5.

The X.PRIM4D matrix observations with 4 column variables and 2000 row observations was made up of the following distributions conditional on the response Y.PRIM4D:

[True Cluster 1]
  1/4 of the observations when the response Y.PRIM4D=1, came from the following Multivariate Normal distribution.

  X.PRIM4D | Y.PRIM4D=1 ~ N([500,500,500,500], [[625, 0,0,0],[0,625,0,0], [0,0,625,0],[0,0,0,625]])

[True Cluster 2]
  1/4 of the observations when the response Y.PRIM4D=1 came from the following Multivariate Normal distribution.

  X.PRIM4D | Y.PRIM4D=1 ~ N([200,1000,200,800], [[700, 0,0,0],[0,200,0,0], [0,0,100,0],[0,0,0,700]])

[True Cluster 3]
  1/4 of the observations when the response Y.PRIM4D=1 came from the following Multivariate Normal distribution.

  X.PRIM4D | Y.PRIM4D=1 ~ N([1000,100,900,100], [[400, 0,0,0],[0,500,0,0], [0,0,600,0],[0,0,0,300]])

[Noise]
  Each of the two column variables for 1/4 of the observations when the response Y.PRIM4D=1 and all observations when Y.PRIM4D=0 came from the following uniform distribution with a range of integer values between 0 and 1023. Let Xi denote the i-th column of X.PRIM4D.

  X1|Y.PRIM4D=1,Y.PRIM4D=0 ~ U(0,1023)

  X2|Y.PRIM4D=1,Y.PRIM4D=0 ~ U(0,1023)

  X3|Y.PRIM4D=1,Y.PRIM4D=0 ~ U(0,1023)

  X4|Y.PRIM4D=1,Y.PRIM4D=0 ~ U(0,1023)

### Usage

    data(PRIM.example.data)

### Format

X.PRIM:
  A matrix of 2 columns named "X1" and "X2" with 1000 row observations.
Y.PRIM
  A vector denoting the observed response corresponding to each row observation of 'X.PRIM' and having a length of 1000
true.Y.status.PRIM
  A vector denoting the true cluster category corresponding to each row observation of 'X.PRIM' and having a length of 1000
X.PRIM4D
  A matrix of 4 columns named "X1", "X2", "X3", and "X4" with 2000 row observations.
Y.PRIM4D
  A vector denoting the observed response corresponding to each row observation of 'X.PRIM' and having a length of 2000
true.Y.status.PRIM4D
  A vector denoting the true cluster category corresponding to each row observation of 'X.PRIM' and having a length of 2000

### Source

A dataset generated with the following code in the "example" section.

### References

See also rfcprim for examples using this simulated data.

### Examples

    data(PRIM.example.data)

     ## The following is the source R code
     ## setting the seed will generate the same dataset
    if (FALSE){
      if (require(MASS)){
        set.seed(20)
        ## Y.PRIM response binary data
        Y.PRIM <- rbinom(1000, 1, 0.5)

        ## X.PRIM matrix, rows corresponding to Y.PRIM
        ##           columns are the variables

        ## when Y.PRIM==1 there is a MVN distribution of the X.PRIM
        ## There is simulation for 3 clusters

        Sigma <- matrix(c(25,0,0,25),2,2)^2

        X1.y1 <- mvrnorm(n=ceiling(length(Y.PRIM[Y.PRIM==1])/4),
                   c(500, 500), Sigma, empirical = FALSE)

        X2.y1 <- mvrnorm(n=ceiling(length(Y.PRIM[Y.PRIM==1])/4),
                   c(400, 100), Sigma, empirical = FALSE)

        X3.y1 <- mvrnorm(n=ceiling(length(Y.PRIM[Y.PRIM==1])/4),
                  c(200, 900), Sigma, empirical = FALSE)

        X4.1.y1 <-  runif(ceiling(length(Y.PRIM[Y.PRIM==1])/4), 0, 1023)

        X4.2.y1 <-  runif(ceiling(length(Y.PRIM[Y.PRIM==1])/4), 0, 1023)
        X4.y1 <- cbind(X4.1.y1, X4.2.y1)

        X.y1 <- rbind(X1.y1, X2.y1, X3.y1, X4.y1)[1:length(Y.PRIM[Y.PRIM==1]),]

        ## when Y.PRIM==0 there is only a uniform distribution of X's
        X1.y0 <- runif(length(Y.PRIM[Y.PRIM==0]), 0, 1023)
        X2.y0 <- runif(length(Y.PRIM[Y.PRIM==0]), 0, 1023)
        X.y0 <- cbind(X1.y0, X2.y0)

        ## true Y.PRIM cluster status:
        ## 0, 4 is noise
        ## 1, 2, 3, are the true clusters

        true.Y.status.PRIM <- c(rep(2, dim(X1.y1)[1]),
        rep(1, dim(X2.y1)[1]), rep(3, dim(X3.y1)[1]),
        rep(4, dim(X4.y1)[1]))[1:length(Y.PRIM[Y.PRIM==1])]

        true.Y.status.PRIM <- c(true.Y.status.PRIM, rep(0,dim(X.y0)[1]))

        ## sort the Y.PRIM to correspond with the X.PRIM matrix
        Y.PRIM<- sort(Y.PRIM, decreasing=TRUE)
        X.PRIM <- rbind(X.y1, X.y0)
        colnames(X.PRIM) <- c("X1", "X2")
      }
       ## 4D Dataset

      if (require(MASS)==TRUE){
        Y.PRIM4D <- rbinom(2000, 1, 0.5)
        ## when Y.PRIM4D==1 there is a MVN distribution of the X
        Sigma1 <- rbind(c(625,0,0,0),
                        c(0, 625, 0, 0),
                        c(0, 0, 625, 0),
                        c(0, 0, 0, 625))
        Sigma2 <- rbind(c(700, 0, 0, 0),
                        c(0, 200, 0, 0),
                        c(0, 0, 100,0),
                        c(0, 0, 0, 700))
        Sigma3 <- rbind(c(400,0,0,0),
                        c(0,500,0,0),
                        c(0,0,600,0),
                        c(0, 0,0,300))

        X1.y1 <- mvrnorm(n=ceiling(length(Y.PRIM4D[Y.PRIM4D==1])/4),
                       c(500, 500, 500, 500), Sigma1, empirical = FALSE)
        X2.y1 <- mvrnorm(n=ceiling(length(Y.PRIM4D[Y.PRIM4D==1])/4),
                       c(200, 1000, 200, 800), Sigma2, empirical = FALSE)
        X3.y1 <- mvrnorm(n=ceiling(length(Y.PRIM4D[Y.PRIM4D==1])/4),
                       c(1000, 100, 900, 100), Sigma3, empirical = FALSE)

        X4.1.y1 <-  runif(ceiling(length(Y.PRIM4D[Y.PRIM4D==1])/4), 0, 1023)
        X4.2.y1 <-  runif(ceiling(length(Y.PRIM4D[Y.PRIM4D==1])/4), 0, 1023)
        X4.3.y1 <-  runif(ceiling(length(Y.PRIM4D[Y.PRIM4D==1])/4), 0, 1023)
        X4.4.y1 <-  runif(ceiling(length(Y.PRIM4D[Y.PRIM4D==1])/4), 0, 1023)

        X4.y1 <- cbind(X4.1.y1, X4.2.y1, X4.3.y1, X4.4.y1)

        X.y1 <- rbind(X1.y1, X2.y1, X3.y1, X4.y1)[1:length(Y.PRIM4D[Y.PRIM4D==1]),]
        ## when Y.PRIM4D==0 there is only a uniform distribution of X's
        X1.y0 <- runif(length(Y.PRIM4D[Y.PRIM4D==0]), 0, 1023)
        X2.y0 <- runif(length(Y.PRIM4D[Y.PRIM4D==0]), 0, 1023)
        X3.y0 <- runif(length(Y.PRIM4D[Y.PRIM4D==0]), 0, 1023)
        X4.y0 <- runif(length(Y.PRIM4D[Y.PRIM4D==0]), 0, 1023)
        X.y0 <- cbind(X1.y0, X2.y0, X3.y0, X4.y0)
        ## true if in a cluster otherwise FALSE
        true.Y.status.PRIM4D <- c(rep(2, dim(X1.y1)[1]), rep(1, dim(X2.y1)[1]), rep(3, dim(X3.y1)[1]),
                           rep(4, dim(X4.y1)[1]))[1:length(Y.PRIM4D[Y.PRIM4D==1])]
        ## NOTE: true.Y.status.PRIM4D=0,4 is uniform, random noise; true.Y.status.PRIM4D=1,2,3
        ## denotes the real cluster category
        true.Y.status.PRIM4D <- c(true.Y.status.PRIM4D, rep(0,dim(X.y0)[1]))
        Y.PRIM4D <- sort(Y.PRIM4D, decreasing=TRUE)
        X.PRIM4D <- rbind(X.y1, X.y0)
        colnames(X.PRIM4D) <- c("X1", "X2", "X3", "X4")
        }
      }

[Package rfcdmin version 1.6.3 Index]