plotly / plotly/plotly.R

Can you implement geom_GeomTextNpc() in plotly ?

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Description

Hi,
I'm using the package ggpmisc to display on ggplot graphique the R² and equation of regression thanks to ggpmisc::stat_poly_eq().
This is working well when I am plotting the ggplot graphic. But when I want to use the function ggplotly() to display the graphic, the R² and the equation disappear.
I receive this messages :
Warning message: In geom2trace.default(dots[[1L]][[1L]], dots[[2L]][[1L]], dots[[3L]][[1L]]) : geom_GeomTextNpc() has yet to be implemented in plotly. If you'd like to see this geom implemented, Please open an issue with your example code at https://github.com/ropensci/plotly/issues

If you have the time, and the desire to implement geom_GeomTextNpc() in plotly, it could be super nice.

I give you a small code to reproduce the problem

#Data cration

df<-tibble(a=c(2,6,3,4,10),
           b=c(3,6,9,12,15))
df

#relation
myFormula<- y ~ poly(x,2,raw = TRUE)

#ggplot
df_plot<-ggplot(data = df,aes(x = a,y = b))+
  geom_point()+
  geom_smooth(method = lm,
              formula = myFormula)+
  ggtitle("polynomial 2")+
    #from here problem with ggplotly
  ggpmisc::stat_poly_eq(
    aes(label=paste("atop(",stat(rr.label),",",
                    stat(eq.label),")",
                    sep="")),
    formula = myFormula,parse = TRUE)

df_plot

#plotly
ggplotly(df_plot)

The ggplot graphic :
ggplot_with_equation

And here the graphic with plotly:
ggplotly

Thank you for creating and implementing plotly 👍
Best,
Fanny

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the geom2trace.default warning for geom_GeomTextNpc() and run the supplied ggplotly(df_plot) reproduction. Trace how ggplot2 layers are converted by ggplotly, then determine the implementation needed for this geom. Done means the warning is gone and the R² and regression equation appear in the interactive plot.

Written by the indexing model from the issue text.

Assessment

Tech stack
plotly, r
Domain
data-visualization
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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