[R] Error in eval(expr, envir, enclos) : object 'Rayos' not found???

[Jhope]

Hi R-listers, 

I am trying to make a trellis boxplot with the HSuccess (y-axis) in each
Rayos (beach sections) (x-axis), for each Aeventexhumed (A, B, C) - nesting
event. I am not able to do so and keep receiving: 

Error in eval(expr, envir, enclos) : object 'Rayos' not found 

Please advise, 

Jean 


require(plyr) 

resp <- read.csv("ABC Arribada R File Dec 12 Jean Jang.csv") 
envir <- read.csv("Responses Environ. Arribada Dec. 12.csv") 

resp <- resp[!is.na(resp$Aeventexhumed), ] 
resp$QuadratEvent <- paste(resp$QuadratID, resp$Aeventexhumed, sep="") 
resp$QuadratEvent <- as.character(resp$QuadratEvent) 

envir <- envir[!is.na(envir$Aeventexhumed), ] 
envir$QuadratEvent <- paste(envir$QuadratID, envir$Aeventexhumed, sep="") 
envir$QuadratEvent <- as.character(envir$QuadratEvent) 


ExDate <- Sector <- Quadrat <- Aeventexhumed <- NULL 
ST1 <- ST2 <- ST3 <- ST4 <- ST0 <- NULL 
Shells <- Hatchlings <- MaxHatch <- DeadHatch <- NULL 
Oldeggs <- TotalEggs <- QuadratEvent <- NULL 

for (q in unique(as.character(resp$QuadratEvent))) { 
  
    s <- resp[as.character(resp$QuadratEvent) == q, ] 

    ExDate <- c(ExDate, as.character(s$ExDate[1])) 
    Sector <- c(Sector, as.character(s$Sector[1])) 
    Quadrat <- c(Quadrat, as.character(s$Quadrat[1])) 
    Aeventexhumed <- as.character(c(Aeventexhumed,
as.character(s$Aeventexhumed[1]))) 
    QuadratEvent<- c(QuadratEvent, q) 

    ST1 <- c(ST1, sum(s$ST1, na.rm=TRUE)) 
    ST2 <- c(ST2, sum(s$ST2, na.rm=TRUE)) 
    ST3 <- c(ST3, sum(s$ST3, na.rm=TRUE)) 
    ST4 <- c(ST4, sum(s$ST4, na.rm=TRUE)) 
    ST0 <- c(ST0, sum(s$ST0, na.rm=TRUE)) 

    Shells <- c(Shells, sum(s$Shells, na.rm=TRUE)) 
    Hatchlings <- c(Hatchlings, sum(s$Hatchlings, na.rm=TRUE)) 
    MaxHatch <- c(MaxHatch, sum(s$MaxHatch, na.rm=TRUE)) 
    DeadHatch <- c(DeadHatch, sum(s$DeadHatch, na.rm=TRUE)) 
    Oldeggs <- c(Oldeggs, sum(s$Oldeggs, na.rm=TRUE)) 
    TotalEggs <- c(TotalEggs, sum(s$TotalEggs, na.rm=TRUE)) 
} 

responses <- data.frame(QuadratEvent, ExDate, Sector, Quadrat, 
                        Aeventexhumed, ST0, ST1, ST2, ST3, ST4, Shells, 
                        Hatchlings, MaxHatch, DeadHatch, Oldeggs, 
                        TotalEggs, stringsAsFactors=FALSE) 

responses$QuadratEvent <- as.character(responses$QuadratEvent) 

data.to.analyze <- join(responses, envir, by="QuadratEvent") 
data.to.analyze$NotHatched <- data.to.analyze$TotalEggs -
data.to.analyze$MaxHatch 
data.to.analyze$Rayos <- paste("Rayos", data.to.analyze$Rayos, sep=".") 

HSuccess <- Shells/TotalEggs 
> library(lattice) 
> trellis.par.set(col.whitebg()) 
> bwplot(HSuccess~Rayos|Aeventexhumed) 
Error in eval(expr, envir, enclos) : object 'Rayos' not found

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