如何更改图例的位置

Question

我有以下代码生成散点图，并且我想更改图例的位置，以便使图例仍在图的外部，但在中心或中间，怎么办？

 f <- list(
   family = "Courier New, monospace",
   size = 18,
   color = "#7f7f7f"
  )
 x <- list(
   title = "Age of Buildings",
   titlefont = f,
   zeroline = FALSE,
   showline = FALSE,
   showticklabels = TRUE,
   showgrid = TRUE
  )
  y <- list(
    title = "Total Violations",
    titlefont = f,
    zeroline = FALSE,
    showline = FALSE,
    showticklabels = TRUE,
    showgrid = TRUE
   )
fig2 <- plot_ly(final, x=~agebuilding, y=~violationstotal, mode= "markers", color = ~INdexrehabless6, size = ~totalvalue)
fig2 <- fig2 %>% layout(xaxis = x, yaxis = y, legend=list(title=list(text='<b> Housing Conditions </b>'))) #chaging name legend
fig2

这是我得到的情节

Answer 1

有几种方法可以做到这一点：

fig2 <- fig2 + layout(legend = list(x = 0.1, y = 0.9)) #puts it on the plot, mess with x and y numbers


fig2 <- fig2 + layout(legend = list(orientation = 'h')) #puts it on the below the plot

有关更多信息，请参见此：https://plotly.com/r/legend/

基本上，您只需要对代码执行此操作：

fig2 <- fig2 %>% layout(xaxis = x, yaxis = y, legend=list(title = list(text='<b> Housing Conditions </b>', orientation = 'h')))

Answer 2

对于具有垂直方向的默认图例，其位置对应于

layout(legend = list(orientation = "v", y = 1, x = 1))

如果要将其放在y方向的底部，请使用

layout(legend = list(orientation = "v", y = 0, x = 1))

如果要使其在y方向居中，请使用

layout(legend = list(orientation = "v", y = .5, x = 1))

如果是水平方向，则默认位置为

layout(legend = list(orientation = "h", y = -.1, x = 0))

，然后将图例放在情节下方的左下角。