geom_crossbar()
Here geom draws the error bar, which can be defined by the lower and upper values. The crossbar function is quite similar to error bar and line range. The crossbar is the hollow bar with the horizontal lines in the middle.
Syntax:
geom_crossbar(mapping = NULL,data = NULL,stat = “identity”,position = “identity”,fatten = 2.5,na.rm = FALSE,orientation = NA,show.legend = NA,inherit.aes = TRUE)
Example :
R
# import libraries library ( "ggplot2" ) # import data df <- ToothGrowth # Transform dose and len column into factor df$dose <- as.factor (df$dose) df$len <- as.factor (df$len) p<- ggplot (df, aes (dose,len)) p + geom_crossbar ( aes (ymin = len , ymax = dose),width = 0.2) |
Output :
Error Bars using ggplot2 in R
Error bars are bars that show the mean score. The error bars stick out from the bar like a whisker. The error bars show how precise the measurement is. It shows how much variation is expected by how much value we got. Error bars can be plated both horizontally and vertically. The horizontal error bar plot shows error bars for group differences as well as bars for groups.
The error bar displays the precision of the mean in one of 3 ways:
- The confidence interval
- The standard error of the mean
- Standard Deviation