如何在绘图中添加水平或垂直参考线的注释? [英] How to add annotations horizontal or vertical reference line in plotly?

问题描述

如果这很重要，我正在使用闪亮的R.输出进行绘图. 我想将注释添加到由layout(shapes = )创建的水平或垂直参考线.它应该能够动态地改变位置，以使它无论在图形上如何放大或缩小都保持可见. 近似示例

I am using plotly for R. output using shiny if that matters. I want to add annotations to horizontal or vertical reference line created by layout(shapes = ). It should be able to dynamically change position so that it stays visible no matter how plotly graph is zoomed in or out. Approximate Example

到目前为止，我只能找到固定位置的文字.我不在乎它是否动态地位于指向参考线的轴或箭头上.

So far I can only find fixed location text. I don't mind if it is dynamically located on axis or arrow pointing to reference lines.

％Edited

我找到了问题的解决方法

I found the sulotion to the problem:

dt <- data.table(x = 1:10, y = rnorm(10))    
annotation <- list(yref = 'paper', xref = "x", y = 0, x = 2, text = "annotation")
plot_ly(type = "scatter", mode = "lines") %>% add_trace(x = dt$x, y = dt$y, mode = "lines") %>% layout(annotations= list(annotation))

基本上，yref = "paper"允许您指定始终相对于图的位置，y=1指图的顶部，而y=0指图的底部

Basically, yref = "paper" allow you to specify a position that is always relative to the plot, y=1 refers to the top of plot and y=0 refers to the bottom of the plot

推荐答案

我找到了解决问题的方法:

I found the sulotion to the problem:

dt <- data.table(x = 1:10, y = rnorm(10))    
annotation <- list(yref = 'paper', xref = "x", y = 0, x = 2, text = "annotation")
plot_ly(type = "scatter", mode = "lines") %>% add_trace(x = dt$x, y = dt$y, mode = "lines") %>% layout(annotations= list(annotation))

基本上，yref ="paper"允许您指定始终相对于图的位置，y = 1表示图的顶部，y = 0表示图的底部

Basically, yref = "paper" allow you to specify a position that is always relative to the plot, y=1 refers to the top of plot and y=0 refers to the bottom of the plot

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