carroll1: Ticks acquired while walking with sneakers or boots.

In kbroman/labstat: Statistics for Lab Scientists

Description

Numbers of ticks acquired while walking with tick preventive (boots and tape) or nonpreventive (sneakers and minimal tape) footwear.

Usage

data(carroll1)

Format

A data frame with three columns: number of ticks and number of times (out of ten) that number was observed with sneakers and boots.

Source

John F. Carroll, USDA

References

Carroll, J. F. and Kramer, M. (2001) Different activities and footwear influence exposure to host-seeking nymphs of Ixodes scapularis and Amblyomma americanum. J. Med. Entomol. 38, 596–600. (See Figure 1b.)

See Also

carroll2, carroll3

Examples

data(carroll1)
# barplot
barplot(as.numeric(t(carroll1[,-1])), space=c(0,0,1,0,1,0),
        col=rep(c("white","black"),3),ylab="Number of samples",
        xlab="Number of nymphs per sample",ylim=c(0,10),
        xlim=c(-0.5,8.5))
abline(h=0)
segments(c(1,4,7),0,c(1,4,7),-0.25,xpd=TRUE)
text(c(1,4,7),-0.7,c("0","1","2"),xpd=TRUE)
legend(5.5,10,c("sneakers","boots"),pch=15,cex=1.3,
       col=c("white","black"))
legend(5.5,10,c("",""),pch=0,bty="n",cex=1.3)

kbroman/labstat documentation built on Jan. 6, 2021, 4:51 a.m.