The following code is giving me problems. I want to export densities
of a distribution to a csv file. At the bottom of the code I use the
hist function to generate the densities. But hist is returning values
greater than 1. I don't understand, why. Any help you can supply is
greatly appreciated.
# Set word path
dir<-"~/Research/MR Distribution Analysis/"
setwd(dir)
getwd()
# Define Objects
Max.Shots=3
Max.Groups=5000
hist.brks <- pretty(range(c(0,4)), 200)
for(sim in (2:Max.Shots)){
x.Data<-matrix(nrow=Max.Groups,ncol=sim,byrow=TRUE)
y.Data<-matrix(nrow=Max.Groups,ncol=sim,byrow=TRUE)
shot2mean.x<-matrix(nrow=Max.Groups,ncol=sim,byrow=TRUE)
shot2mean.y<-matrix(nrow=Max.Groups,ncol=sim,byrow=TRUE)
Euclid.Dist<-matrix(nrow=Max.Groups,ncol=sim,byrow=TRUE)
mean.radius<-vector(mode="numeric",length=Max.Groups)
# Generate the Simulation Data
###################################################################
# Number of Groups
for(Groups in (1:Max.Groups)) {
# Number of Shots per Group
for(Shots in (1:sim)) {
# Populate the Simulation Data
x.Data[Groups,Shots]<-rnorm(n=1,mean=0,sd=1)
y.Data[Groups,Shots]<-rnorm(n=1,mean=0,sd=1)
}
}
# Calculate the Component Distances from the Shots to the Group Mean
# Calculate the Euclidean Distance from the Shots to the Group Mean
# Calculate the Group Mean Radius
###################################################################
# Number of Groups
for(Groups in (1:Max.Groups)){
# Number of Shots per Group
for(Shots in (1:sim)){
shot2mean.x[Groups,Shots]<-(x.Data[Groups,Shots]-
mean(x.Data[Groups,]))^2
shot2mean.y[Groups,Shots]<-(y.Data[Groups,Shots]-
mean(y.Data[Groups,]))^2
Euclid.Dist[Groups,Shots]<-sqrt(shot2mean.x[Groups,Shots]
+shot2mean.y[Groups,Shots])
}
mean.radius[Groups]<-mean(Euclid.Dist[Groups,])
}
f<-hist(mean.radius,breaks=hist.brks,plot=FALSE)
density.data<-cbind(sim,f$mids,f$density)
colnames(density.data)<-c("Simulation","MidPoint","Density")
if (sim==2) {Simulation.Data<-density.data} else {Simulation.Data<-
rbind(Simulation.Data,density.data)}
rm(x.Data)
rm(y.Data)
rm(shot2mean.x)
rm(shot2mean.y)
rm(Euclid.Dist)
rm(mean.radius)
}
write.table(
Simulation.Data,
file=paste(dir,"/DATA/Simulation_Data.csv",sep=''),
sep=",",
quote=FALSE,
row.names=FALSE,
qmethod="double")
Steven Matthew Anderson
Anderson Research, LLC
Statistical Programming and Analysis
SAS (R) Certified Professional
adastr...@mac.com
Ad Astra per Aspera
שָׁלוֹם
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