| addErrorBars | R Documentation | 
Add error bars to current plot (uses base arrows function).
addErrorBars(xpos, ypos, errorSize, arrowSize = 0.1)
| xpos | x-position of data-points | 
| ypos | y-position of data-points | 
| errorSize | +- size of error bars | 
| arrowSize | Width of the errorbar arrow | 
Plot (no return value)
# Example 1
plot(c(1, 2), c(450, 500), xlim = c(0.5, 2.5), ylim = c(400, 600), type = "o")
addErrorBars(c(1, 2), c(450, 500), errorSize = c(20, 20))
# Example 2
plot(c(1, 2), c(450, 500), xlim = c(0.5, 2.5), ylim = c(400, 600), type = "o")
addErrorBars(c(1, 2), c(450, 500), errorSize = c(20, 40), arrowSize = 0.1)
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