> x<-c(1,2,3,4,5,6,7,8,9,10) > y<-c(1.3,2.5,4.6,5.3,5.9,6.7,7.4,8.5,9.4,10.4) > erry<-c(0.2,0.3,0.2,0.1,0.4,0.2,0.3,0.4,0.3,0.2) > > plot(x, y) > > n <- length(x) > Y <- array(c(y-erry, y+erry), dim=c(n,2)) > for(i in 1:n) + lines(rep(x[i],2), Y[i,])
Others may have more elegant solutions, but this is simple enough for me to understand AND produces essentially the same result in R 1.8.1 and S-Plus 6.2.
hope this helps. spencer graves
Fulvio Copex wrote:
Dear all,
I have 2 variables,
x<-c(1,2,3,4,5,6,7,8,9,10)
y<-c(1.3,2.5,4.6,5.3,5.9,6.7,7.4,8.5,9.4,10.4)
each point of the y variable has an error:
erry<-(0.2,0.3,0.2,0.1,0.4,0.2,0.3,0.4,0.3,0.2)
how to plot(x,y) with the errors segments?
Thank you,
Copex
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