I am studying about SVM in R .I have created the model and after the creating the model I ave plot the model with the data and I am getting the **x** in my plot but I am not able to understand what they are and why the are generating.

set.seed(1)

x<-matrix(rnorm(20*2),ncol=2)

y<-c(rep(-1,10),rep(1,10))

x[y==1,]=x[y==1,]+1

plot(x,col=(3-y))

dat<-data.frame(x=x,y=as.factor(y))

require(e1071)

svmfit=svm(y~.,data=dat,kernel=“linear”,cost=10,scale=FALSE)

plot(svmfit,dat)

we can see there are

**x**in the plot but points in circle .