r - ggplot2 each group consists of only one observation -

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i trying plot graph using ggplot2

so have following dataframe:

   iter        se perf name 1    v1 0.6463573 12.8    e 2    v2 0.3265986 16.8    e 3    v3 0.2333333 19.1    e 4    v4 0.1000000 19.9    e 5    v5 0.0000000 20.0    e 6    v1 0.7483315 12.6    f 7    v2 0.6333333 16.3    f 8    v3 0.6798693 18.8    f 9    v4 0.2236068 19.5    f 10   v5 0.1000000 19.9    f

and trying plot in format similar page (under line graphs).

so here code plotting:

pd <- position_dodge(.1) ggplot(df, aes(x=iter, y=perf, colour=name)) +    geom_errorbar(aes(ymin=perf-se, ymax=perf+se), width=.1, position=pd) +   geom_line(position=pd) +   geom_point(position=pd)+   ylim(0, 20)

and working nicely: enter image description here, except want these dots connected. tried add group=1 or group=name part aes(x=iter, y=perf, colour=name) did not help.

i these warnings:

ymax not defined: adjusting position using y instead ymax not defined: adjusting position using y instead geom_path: each group consist of 1 observation. need adjust group aesthetic?

after looking in internet, found first 2 due position_dodge, think because of ggplot, third 1 because of disconnected points.

any ideas how connect them?

you need adjust group aesthetic, replace : 

   geom_line(position=pd)

by 

  geom_line(position=pd,aes(group=name))

enter image description here


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