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# Create a simulation data 

df<-data.frame(a=rnorm(1000),b=rnorm(1000),c=rnorm(1000), d=rnorm(1000))

par(mfrow=c(2,2)) # Create two rows and two columns

par(bg="gray") # Manipulate background 


for (i in 1:ncol(df)){
  hist(df[[i]], main=paste("Plot ", i), xlab = paste("Values Plot",i)) # Create multiple histigram plots 
  box(lty = "solid")
}

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