Yellow Perch (Perca flavescens) fork lengths and weights separated by year.
A data frame with 100 observations on the following 3 variables:
Fork Length (nearest mm) at capture
Weight (nearest 0.1 g) at capture
Year of capture (1994 or 2000)
Weight-Length
Length Frequency
data(YPerchGL)
str(YPerchGL)
head(YPerchGL)
op <- par(mfrow=c(1,2),pch=19)
plot(w~fl,data=YPerchGL,subset=year==1994,main="1994")
plot(w~fl,data=YPerchGL,subset=year==2000,main="2000")
par(op)
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