Thanks a lot for the interesting possibilities - R is wonderful!
BW
Troels
-----Oprindelig meddelelse-----
Fra: Rui Barradas <ruipbarra...@sapo.pt>
Sendt: 16. december 2019 19:31
Til: Troels Ring <tr...@gvdnet.dk>; r-help mailing list <r-help@r-project.org>
Emne: Re: [R] variable in annotation, ggplot2
Another way:
expr <- substitute(V == x, list(x = as.list(V))) ggplot(df, aes(x, y)) +
geom_line() +
annotate("text", x = 3, y = 20,
label = deparse(expr), parse = TRUE)
Or this one (nothing to do with your use case, it's an example of plotmath):
v <- paste("atop(", paste0("'V ='*alpha[", V, "]", collapse = ","), ")")
ggplot(df, aes(x, y)) + geom_line() +
annotate("text", x = 3, y = 20,
label = v, parse = TRUE)
More idiomatic? At least it allows for the use of plotmath.
Hope this helps,
Rui Barradas
Às 17:27 de 16/12/19, Rui Barradas escreveu:
> Hello,
>
> If you form the label with paste before the plot, it can display both
> values. Something like
>
>
> lab <- paste("V = ", paste(V, collapse = ","))
>
> ggplot(df,aes(x=x,y=y)) + geom_line() +
> annotate("text", x = 3, y = 20, label = lab)
>
>
> Hope this helps,
>
> Rui Barradas
>
> Às 14:55 de 16/12/19, Troels Ring escreveu:
>> Hi friends - I have a simple problem of inserting values in label of
>> a ggplot2. I have a vector V with two values and want to show them in
>> the plot.
>>
>> Here is what I tried - at most get the first entry "28".
>>
>> R version 3.6.1 (2019-07-05)
>>
>> Windows 10
>>
>>
>> BW
>> Troels
>>
>>
>> library(ggplot2)
>>
>> x <- 1:5
>>
>> y <- x^2
>>
>> V <- c(28,14)
>>
>> df <- data.frame(x=x,y=y)
>>
>> ggplot(df,aes(x=x,y=y))+geom_line()+
>>
>> annotate("text",x=3,y=20,label=bquote(V ==.(as.vector(V))))
>>
>>
>>
>>
>> ggplot(df,aes(x=x,y=y))+geom_line()+
>>
>> annotate("text",x=3,y=20,label=expression(paste("V is ",V)))
>>
>>
>>
>> ggplot(df,aes(x=x,y=y))+geom_line()+
>>
>> annotate("text",x=3,y=20,label=bquote(V ==.(V)))
>>
>>
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>
> ______________________________________________
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