search for: stotwokm

Hi, I am using R on Windows XP. I am using 'arrows' funtion to plot the variance as error bar, BUT error bar goes only one side of the data point, I need to plot the error bar on both side of the data point (plot is attached), I am using following commands to plot, plot(file3$lat,file3$STotwoKm,pch=21,cex=2.5,ylim=c(-0.2,2.5),xlim=c(-50,50),xlab=NA,ylab=NA, col=1, xaxs="i",yaxs="i") arrows(file3$lat, file3$var1, file3$lat,file3$STotwoKm, col=1, code=3, angle=90, length=0.1) Here: lat=latitte (x-axis) STotwoKm = Data values (y-axis) Var1 = Varianc...