how to add errorbar in ggplot2

Question

Here my data frame

Month   foresttype  type    average sd
May.    LYL branch  9.18    6.21
May.    LYL leaf    2.41    0.63
May.    LYL flower  5.48    4.83
May.    LYL barks   0.56    0.17
May.    HBS branch  6.38    1.14
May.    HBS leaf    6.81    4.48
May.    HBS flower  2.55    1.38
May.    HBS barks   0.48    0.17
May.    YSL branch  0.9 0.18
May.    YSL leaf    10.38   8.18
May.    YSL flower  10.19   3.81
May.    YSL barks   0.39    0.14
Jun.    LYL branch  10.17   7.62
Jun.    LYL leaf    1.99    1.33
Jun.    LYL flower  0.4 0.26
Jun.    LYL barks   0.16    0.13
Jun.    HBS branch  9.81    8.79
Jun.    HBS leaf    3.02    0.41
Jun.    HBS flower  3.41    4.93
Jun.    HBS barks   0.62    0.6
Jun.    YSL branch  1.39    0.26
Jun.    YSL leaf    4.39    5.26
Jun.    YSL flower  10.67   10.39
Jun.    YSL barks   0.33    0.03
Jul.    LYL branch  3.23    3.99
Jul.    LYL leaf    1.21    0.09
Jul.    LYL flower  1.74    1.04
Jul.    LYL barks   0.23    0.25
Jul.    HBS branch  2.73    3.11
Jul.    HBS leaf    3.46    2.06
Jul.    HBS flower  3.31    4.93
Jul.    HBS barks   0.7 0.38
Jul.    YSL branch  1.38    0.84
Jul.    YSL leaf    3.4 4.44
Jul.    YSL flower  10.9    9.81
Jul.    YSL barks   0.66    0.5
Jul.    LYL branch  1.54    1.7
Aug.    LYL leaf    2.01    0.75
Aug.    LYL flower  2.61    0.77
Aug.    LYL barks   0.3 0.51
Aug.    HBS branch  0.22    0.37
Aug.    HBS leaf    9.25    9.87
Aug.    HBS flower  2.58    1.61
Aug.    HBS barks   0.14    0.1
Aug.    YSL branch  0.8 0.52
Aug.    YSL leaf    1.86    0.65
Aug.    YSL flower  4.92    4.45
Aug.    YSL barks   0.71    0.35
Sep.    LYL branch  8.92    3.25
Sep.    LYL leaf    42.16   29.3
Sep.    LYL flower  17.38   12.96
Sep.    LYL barks   0.16    0.04
Sep.    HBS branch  2.9 2.74
Sep.    HBS leaf    52.47   42.82
Sep.    HBS flower  3.02    2.29
Sep.    HBS barks   0.1 0.1
Sep.    YSL branch  4.58    1.5
Sep.    YSL leaf    17.25   17.17
Sep.    YSL flower  5.15    4.06
Sep.    YSL barks   0.14    0.06
Oct.    LYL branch  3.18    2.13
Oct.    LYL leaf    65.74   59.98
Oct.    LYL flower  0.69    0.41
Oct.    LYL barks   0.14    0.12
Oct.    HBS branch  0.1 0.1
Oct.    HBS leaf    60.08   62.02
Oct.    HBS flower  0.3 0.28
Oct.    HBS barks   0.04    0.04
Oct.    YSL branch  1.21    1.15
Oct.    YSL leaf    41.54   25.02
Oct.    YSL flower  2.75    2.06
Oct.    YSL barks   0.14    0.09


df <- ddply(data1,.(Month,foresttype),transform,ystart = cumsum(average),yend = cumsum(average) + sd) 

p=ggplot() +geom_bar(data=df, aes(y = average, x = foresttype, fill = type),stat="identity",position='stack') +theme_bw() + facet_grid( ~ Month)

m=p+geom_segment(data=df,aes(x=foresttype,xend=foresttype,ymin = ystart,ymax = yend))+theme_bw()

n=m+geom_point(data=df,aes(x = foresttype,y = yend),shape = "|",show_guide = FALSE)

Now, I do not know why errorbar cannot be added?

Didzis Elferts · Accepted Answer · 2013-04-15 13:36:33Z

3

You can add error bars with geom_errorbar() (arguments width=0 will make just vertical lines without horizontal line). Also simplified your code by putting df and x=foresttype inside ggplot() call as it is used in all geoms.

ggplot(df,aes(x = foresttype))+
  geom_bar(aes(y = average, fill = type),stat="identity",position='stack')+
  geom_errorbar(aes(ymin = ystart,ymax = yend),width=0)+facet_grid( ~ Month)

enter image description here

answered Apr 15, 2013 at 13:36

Didzis Elferts

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2 Comments

user2282593 Over a year ago

thanks a lot！i have a new questions，how to order the bar according to the Month, as you see above figure,Aug is first bar,but i want to make May. as the first, and how to do?

Didzis Elferts Over a year ago

@user2282593 You should reorder levels of facts Month in dataframe df and then plot data df$Month<-factor(df$Month,levels=c("May.","Jun.","Jul.","Aug.","Sep.","Oct."))

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