Strange formatting of legend in ggplotly in R

Question

I'm trying to turn a ggplot into a plotly. The ggplot renders fine, but when I put it through ggplotly, suddenly the legend adds parenthesis and ",1" after the label.

Here's a sample fake data:

sorted1<-data.frame(CommDate=c(as.Date("2017-09-12"), as.Date("2017-10-15")), CommName=c("Foo", "Bar"), PubB4=c(2,3))

And here's the code I'm trying to run on it:

ggplotly(ggplot(sorted1, aes(x=as.Date(CommDate), y=PubB4))+
           geom_smooth(level=0.0, aes(colour="Moving average"), se=FALSE)+
           geom_point(aes(fill=CommName), size=4)+
           expand_limits(y=c(0,4.5))+
           geom_line(mapping=aes(y=4),colour="orangered3",size=1)+
           geom_text(mapping=aes(y=4.2, x=min(sorted1$CommDate)+4), label="Target", size=3)+
           xlab("Committee Date")+
           guides(fill=guide_legend(title="Committee Names"), colour=guide_legend(title.theme=element_blank(),title=NULL))+
           scale_x_date(labels = date_format("%b-%y"))+
           theme_light()+
           theme(plot.title=element_text(hjust=0.5, size=12),panel.grid.major.x = (element_blank()), 
                 panel.grid.minor.x = (element_blank()), 
                 axis.title = element_text(size=8), legend.title = element_text(size=10),
                 legend.text = element_text(size=8), legend.box = 'vertical', legend.spacing.y = unit(-2,"mm"))+
           scale_colour_manual(name="",values="#0072B2"))

(the geom_smooth doesn't render here, but it does with the full data.)

Here's what I get from this:

Why does the legend show up as "(foo,1)"?

I tried removing the geom_smooth which actually solved the problem, but I need it there - how can I keep it but fix the legend?

Thanks!

Update: OK, I started commenting out stuff to see what happens. If I remove the aes() from the geom_smooth, that also fixes the problem, as long as I keep the scale_colour_manual commented off as well. But I really would like to have control over the geom_smooth's aesthetics, and include it in the legend. So I'm making progress, but still not quite there...

Answer 1

Since nothing I did worked, I took the dive and taught myself how to create the chart directly in plotly. For the benefit of possible future viewers, here's how the chart is recreated in plotly (sans some beautification that I'll get around to another time):

plot_ly(sorted, x=~CommDate) %>%
  add_markers(y=~PubB4, color=~factor(CommName), size=I(15)) %>% 
  add_lines(x=loess.smooth(sorted$CommDate,sorted$PubB4)$x,         
    y=loess.smooth(sorted$CommDate,sorted$PubB4)$y, name = "Rolling Average", 
    showlegend = TRUE, size=I(3)) %>%
  add_lines(x=c(min(sorted$CommDate),max(sorted$CommDate)),y=4, 
    color=I("red"), name="target", size=I(3)) %>%
  layout(yaxis=(list(range=c(0,max(c(4.5,sorted$PubB4))))),xaxis=list(range=c(min(sorted$CommDate)-10, max(sorted$CommDate)+5))) 

Answer 2

Override the legend names using:

scale_color_manual(labels = c("Foo", "Bar"))

Or blank "" if you're trying to remove them - looks like you may have tried using name =