I've got the strange problem with clock24.plot that only the first data point (phase = 23.38, size = 0.44) from the phases/sizes numeric vectors is plotted. Does anyone have an idea why this could be? library(plotrix) phases <- c(23.38, 22.29, 22.71) sizes <- c(0.44, 0.30, 0.30) clock24.plot(sizes,phases)