# R/print.sightest.R In SightabilityModel: Wildlife Sightability Modeling

#### Documented in print.sightest

```#' Print method for sightability estimators
#'
#' Prints fitted sightability model, sampling information, and sightability
#' estimate (with confidence interval)
#'
#'
#' @aliases print.sightest print.sightest_ratio
#' @param x Sightability object, output from call to Sight.Est() or
#' Sight.Est.Ratio() functions.
#' @param ... arguments to be passed to or from other methods
#' @author John Fieberg and Carl James Schwarz
#' @keywords print
#' @export

print.sightest <-
function(x,...){
cat("Call:\n")
print(x\$call)
cat("\n------------------- SIGHTABILITY MODEL ---------------------\n")
print(x\$sight.model)
cat("\n----------------- Population Survey data  ----------------\n")
cat("\n Stratum Sampling Information\n")
print(x\$samp)

cat("\n Number of animals seen in each stratum\n")
ua <- tapply(x\$odat\$total,x\$odat\$stratum, sum)
print(format(ua, big.mark=","), quote = FALSE)
Tot.seen <- sum(ua)
cat("\n-------------- POPULATION ESTIMATE (",100*(1-x\$alpha),"% CI) ----------------\n")
z <- qnorm(1-x\$alpha/2)
if(x\$CI.method == "normal"){
temp <- rep(x\$est[1], 3)+c(0, -z, z)*sqrt(x\$est[2])
}
else{  #CI under lognormal assumption (see Wong p. 65-67)

#Estimated number of animals that were not seen (assumed to be lognormally distributed)
tau.m.T <- x\$est[1]-Tot.seen
cv2 <- x\$est[2]/(tau.m.T)^2
cfact <- exp(z*sqrt(log(1+cv2)))
temp <- rep(tau.m.T, 3)*c(1, (1/cfact)*sqrt(1+cv2), cfact*sqrt(1+cv2))+ rep(Tot.seen, 3)
}
names(temp) <- NULL
temp <- format(round(temp, 0), big.mark=",")
cat("\n")
temp2 <- paste("tau.hat = ", temp[1], ";  ",100*(1-x\$alpha), "% CI = (", temp[2], ", ", temp[3], ")")
print(temp2[1], quote = FALSE)
cat("\n")
cat("\n------------------  SE(tau.hat) --------------------------------\n")
cat("Variance method: "); print(x\$var.method)
SE <- sqrt(x\$est[2])
names(SE) <- "SE"
print(format(round(SE, 0),  big.mark=","), quote = FALSE)
cat("\n-------------- Variance Components -------------------\n")
cat("\n")
print(format(round(x\$est[3:5], 0), big.mark=","), quote = FALSE)
}
```

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SightabilityModel documentation built on Aug. 20, 2023, 1:08 a.m.