plotly - ggplotly - R, labeling trace names -

i'm new plotly , not able find relevant documentation on how name traces meaningful label appears in plot rendered ggplotly. here ggplotly site shows number of examples. needed show meaningful label on hover instead of value followed trace0, trace1, etc.

for example, in first plot, how can labels appear shows:

proportion: value

total bill: value

ideally, directly in r rather through web interface. in advance.

you can edit of plotly figure properties after ggplot2 conversion before send plotly. here example changes legend entry names manually. i'll repeat here:

df <- data.frame(x=c(1, 2, 3, 4), y=c(1, 5, 3, 5), group=c('a', 'a', 'b', 'b')) g <- ggplot(data=df, aes(x=x, y=y, colour=group)) + geom_point()  # intermediate step `ggplotly` calls p <- plotly_build(g)  # manually change legend entry names, "trace0", "trace1" in case p$data[[1]]$name <- 'group a' p$data[[2]]$name <- 'group b'  # send plotly account p$filename <- 'ggplot2-user-guide/custom-ggplot2' plotly_post(p) 

the extended example here explains in more detail how , why works.

note in general legend item names, e.g. "trace0", going labels grouped in dataframe (as in ggplot2).