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Adding Measures of Central Tendency to Histograms in R
png("beaverhistextra.png")
layout(matrix(c(1:2), 2, 1,
byrow = TRUE))
hist(beaver1$temp, # histogram
col = "peachpuff", # column color
border = "black",
prob = TRUE, # show densities instead of frequencies
xlim = c(36,38.5),
ylim = c(0,3),
xlab = "Temperature",
main = "Beaver #1")
lines(density(beaver1$temp), # density plot
lwd = 2, # thickness of line
col = "chocolate3")
abline(v = mean(beaver1$temp),
col = "royalblue",
lwd = 2)
abline(v = median(beaver1$temp),
col = "red",
lwd = 2)
legend(x = "topright", # location of legend within plot area
c("Density plot", "Mean", "Median"),
col = c("chocolate3", "royalblue", "red"),
lwd = c(2, 2, 2))
hist(beaver2$temp, # histogram
col = "peachpuff", # column color
border = "black",
prob = TRUE, # show densities instead of frequencies
xlim = c(36,38.5),
ylim = c(0,3),
xlab = "Temperature",
main = "Beaver #2")
lines(density(beaver2$temp), # density plot
lwd = 2, # thickness of line
col = "chocolate3")
abline(v = mean(beaver2$temp),
col = "royalblue",
lwd = 2)
abline(v = median(beaver2$temp),
col = "red",
lwd = 2)
legend(x = "topright",
c("Density plot", "Mean", "Median"),
col = c("chocolate3", "royalblue", "red"),
lwd = c(2, 2, 2))
dev.off()
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