r - geom_text and facets not working -


data file way big dput hoping able identify error. here story: produced following small multiples plot using ggplot following code. working fine. 

ggplot(sm.df, aes(year, n, group = 1)) + geom_line(aes(colour = top10)) +  facet_wrap( ~ shorttitle, ncol=7) + theme_bw() + theme(panel.grid.major = element_blank(),  panel.grid.minor = element_blank(),  axis.text.x = element_text(angle=45, hjust=1, size =8)) +  scale_x_discrete(breaks=seq(1989, 2020, 8)) +  ylim(0, 150)

enter image description here

now, want annotate each facet overall n. created vector containing x position, y position, , actual values plotted. so, basically, in same x , y position on every plot, different label. 

'data.frame':   78 obs. of  3 variables:  $ x1     : num  12.5 12.5 12.5 12.5 12.5 12.5 12.5 12.5 12.5 12.5 ...  $ y1     : num  130 130 130 130 130 130 130 130 130 130 ...  $ n.label: int  1650 1456 1348 1216 1086 1035 985 940 888 826 ...

but, when add geom_text(data = x.df, aes(x = x1, y = y1, label = n.label), inheret.aes=false) plot, appears though every label being reprinted on every facet. doing wrong. enter image description here

i have poured through on how annotate faceted plots, missing problem. appreciated if have ideas -- not straightforward produce data, guess if need to.

this answer similar question should help. there needs identifier identifies facet print label on. in case, should use shorttitle purpose.

this modified example using mtcars , both faceting , labeling according number of gears

library(ggplot2)  xpos <- c(10,10,10)  ypos <- c(inf,inf,inf) lab <- c(378,2,50) gears <- c(3:5) ldata <- data.frame(xpos, ypos, lab, gears)   ggplot(mtcars) + geom_bar(aes(x=cyl)) + facet_wrap(~gears, ncol=2) +    geom_text(data=ldata, aes(x=xpos, y=ypos,                              label=lab, size=1),              vjust=2, parse=false)

try adding shorttitle list of labels. looks may need. if provide subsample of data frame, sure.


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