plotly adding a source or caption to a chart

Question

Is there a way to add a data source / caption to a chart in Plotly, similar with what can be done in ggplot with the caption argument:

labs(capt         


        

Answer 1

annotation offers a simple way to add a caption to a chart in plotly:

library(plotly)
plot_ly(x=~hp, y=~mpg, data=mtcars, type="scatter", mode="marker") %>% 
 layout(annotations = 
 list(x = 1, y = -0.1, text = "Source: data I found somewhere.", 
      showarrow = F, xref='paper', yref='paper', 
      xanchor='right', yanchor='auto', xshift=0, yshift=0,
      font=list(size=15, color="red"))
 )

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More details are given here and here.