It is assumed that first row of dataset contains the y-coordinates of points, second rows contains size of lower error bar and third - size for upper error bar. If only two rows are provided it is assumed that error bars are symmetric.
plotErrorbars(ps, col = ps$col, pch = 16, lwd = 1, cex = 1, ...)
`plotseries` object
color for the error bars
marker symbol for the plot
line width for the error bars
scale factor for the marker
other arguments for function `points()`.