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Placing error bars in barplot using ggplot2

Hi, I am using ggplot version 0.9.3.2 in RStudio, and I am trying to make a bar graph with errors. The problem is that the error bars are not located correctly. I need them to rise above individual bars.

I have such a data frame

concentration variable value sd 1 0 AF_B 0.3567126 0.010391001 2 0.5x AF_B 0.3355766 0.003480245 3 1x AF_B 0.3001138 0.009104821 4 5x AF_B 0.2658911 0.016312390 5 10x AF_B 0.2115522 0.011056590 6 100x AF_B 0.2655958 0.015092367 7 0 D_B 0.3567126 0.010391001 8 0.5x D_B 0.3453078 0.011639252 9 1x D_B 0.3380180 0.004357810 10 5x D_B 0.3349004 0.018119644 11 10x D_B 0.3186451 0.014515436 12 100x D_B 0.3174700 0.016685932

I have the following code

  dodge = position_dodge(width=0.9) c = ggplot(data=dm, aes(y=value,x=concentration)) c + geom_bar(position = dodge, stat="identity", aes(fill=variable,colour=variable,group=variable, colour="black")) + geom_errorbar(aes(ymin=value-sd,ymax=value+sd), position=dodge, width=0.1, size=0.3) + ylab("mu_max [h-1]") + scale_x_discrete(limits=c("0","0.5x","1x","5x","10x","100x"))

and gives me this graph, which is obviously

http://i.imgur.com/1zwbxMv.png

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1 answer

You must move the fill=variable argument inside the ggplot() call to make sure geom_errorbar() also uses variable as an evasion variable.

 ggplot(data=dm,aes(y=value,x=concentration,fill=variable))+ geom_bar(position = position_dodge(), stat="identity") + geom_errorbar(aes(ymin=value-sd,ymax=value+sd), position=dodge,width=0.1,size=0.3)+ ylab("mu_max [h-1]") + scale_x_discrete(limits=c("0","0.5x","1x","5x","10x","100x"))

enter image description here

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Source: https://habr.com/ru/post/954887/

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