如何更改水平 Plotly 条形图中轨迹的顺序？

Question

When I add a trace to a horizontal bar chart in R Plotly the additional trace is placed above the first trace, but in the legend it is vice versa. How can I place the additional trece under the first one as in the legend?

And/or how can I change the order in the legend?

library(plotly)
library(dplyr)
df <- mtcars %>% group_by(cyl) %>% summarise_at(c('qsec','mpg'), funs(mean))


figh <- plot_ly(df, y = ~ cyl, x = ~ qsec, type = 'bar', orientation = 'h'
               ,marker = list(color = 'rgb(80, 160, 200)')
)
figh <- figh %>% add_trace(x = ~ mpg
                         ,marker = list(color = 'rgb(220, 80, 80)')
)
figh

Answer 1

To change the order in the legend, you can change traceorder in legend using layout .

traceorder ...

Determines the order at which the legend items are displayed. If "normal", the items are displayed top-to-bottom in the same order as the input data. If "reversed", the items are displayed in the opposite order as "normal".

https://plotly.com/r/reference/layout/#layout-legend-traceorder

layout(figh, legend = list(traceorder = "reversed"))