Hello forum, 

I am using R to do some Exploratory analysis on my data resulting in the
following 4 plots. #1- Histogram of the variable; #2- Kernel density
estimation of the variable; #3- Normal Q-Q plot ; #4- Box-plot of the
variable. 

The error message comes in when i try to plot # 2 above when there are
missing values in a specific column. 

For other subjects with non missing values in each variable, i can plot
using the code and then i can proceeed to the other plots using the code
below: 

The code is as follows: 

Chair002OD<-read.csv("Chair002OD.csv", header=TRUE) 
attach(Chair002OD) 
 names(Chair002OD) 
oldpar<-par(mfrow=c(2,2),oma=c(0,0,2,0) 
  0.1) 

truehist(SDANN5mins,SDANN5mins="FD",col="blue",main="Histogram of
SDANN5mins", 
ylab="Frequency",prob=FALSE) 
box() 
  
  
plot(density(SDANN5mins,lwd=1, main="Density estimation",font.main=1) 
rug() 
Error in density.default(SDANN5mins) : 'x' contains missing values 

If there are no missing values, i can proceed with getting all 4 plots
as needed. 

If i use na.action=na.omit, where do i put this 

 for example: 
plot(density(SDANN5mins,lwd=1, main="Density
estimation",font.main=1,na.action=na.omit) 

Any help would be appreciated. 
Thanks. 
MAA

 

Doctoral candidate 

Newcastle University


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