First of all: it is very unfortunate and surprising that R cannot draw error bars "out of the box". Here is my favourite workaround, the advantage is that ... ... <看更多>

R /error.bar.R defines the following functions: error.bar. ... Add error bars onto barplot #' #' @param x A matrix object output from barplot() function. ... <看更多>

There are two general ways to approach error bars in R: Come with your averages and variability already calculated and included in your data ... ... <看更多>

The following code will plot a bar-chart using ggplot2 library, ... for deriving the standard errors(deviation) so as to calculate the errorbar limits(CI). ... <看更多>