search for: xyerrorbar

Dear R-help, I am looking for a function that will plot error bars in x- or y-direction (or both), the same as the Gnuplot function 'plot' can achieve with: plot "file.dat" with xyerrorbars,... Rsite-searching led me to the functions 'errbar' and 'plotCI' in the Hmisc, gregmisc, and plotrix packages. As I understand the descriptions and examples, none of these functions provides horizontal error bars. Looking into 'errbar' and using segments, I wrote a sma...