R 绘图自定义数据格式变体

我正在尝试访问customdata通过javascrit分配给每个数据点（例如为每个点分配一个超链接）。然而，我注意到数据格式从一个图变为另一个图，这看起来很奇怪。

这在本例中完美运行（基于this https://stackoverflow.com/questions/71549382/how-to-make-tiles-open-a-hyperlink-using-ggplotly-r帖子），那就是当fill审美是一种character vector:

library(plotly)
library(htmlwidgets)

js <- "function(el, x) {
         el.on('plotly_click', function(d) {
           console.log(d);
           console.log(d.points[0].data.customdata[0]);
       });
       }"

X <- data.frame(x = c(1, 2, 1, 2), y = c(1, 1, 2, 2), z = as.character(1:4), mydata = letters[1:4])

gg <- ggplot(X, aes(x = x, y = y, customdata = mydata)) + geom_tile(aes(fill = z))

ggplotly(gg) %>% onRender(js)

As can be seen, a single and correct custom data shows up when clicking on each point. The structure of the customdata is similar to other plots.

然而，当z作为数字变量输入，自定义数据的结构表现得很奇怪：

X <- data.frame(x = c(1, 2, 1, 2), y = c(1, 1, 2, 2), z = 1:4, mydata = letters[1:4])

gg <- ggplot(X, aes(x = x, y = y, customdata = mydata)) + geom_tile(aes(fill = z))

ggplotly(gg) %>% onRender(js)

Is this a bug? How can I fix this? In fact, my dataset is much larger than the one in this example.

Edit
@ismirsehregal 提供了适用于上述示例的解决方案。然而，似乎customdata获取向量数据as is，这似乎是非常错误的。因此，如果我们改变顺序X the js脚本停止工作。

展示：

library(plotly)
library(htmlwidgets)

js <- "function(el, x) {
         el.on('plotly_click', function(d) {
           var zdimensions = [ 0, 0 ];
           var vecindex = 0;
           var clickedcustomdata = '';
           
           var zdimensions = [ d.points[0].data.z.length, d.points[0].data.z[0].length ];
           vecindex = d.points[0].pointIndex[0]*zdimensions[1] + d.points[0].pointIndex[1];
           clickedcustomdata = d.points[0].data.customdata[vecindex];
           console.log(d);
           console.log(clickedcustomdata);
         });
       }"

X <- data.frame(x = c(1, 2, 3, 1, 2, 3),
                y = c(1, 1, 1, 2, 2, 2), 
                z = 1:6,
                mydata = letters[1:6])

X <- X[order(-X$z),]

gg <- ggplot(X, aes(x = x, y = y, customdata = mydata)) + geom_tile(aes(fill = z))
fig <- ggplotly(gg) %>% onRender(js)
fig

我想一个潜在的解决方案是提前订购X在 R 中所以它与矩阵顺序匹配？

这是一个基于以下内容的解决方法pointIndex.

我正在计算向量索引customdata根据提供的pointIndex:

library(plotly)
library(htmlwidgets)

js <- "function(el, x) {
         el.on('plotly_click', function(d) {
           var zdimensions = [ 0, 0 ];
           var vecindex = 0;
           var clickedcustomdata = '';
           
           var zdimensions = [ d.points[0].data.z.length, d.points[0].data.z[0].length ];
           vecindex = d.points[0].pointIndex[0]*zdimensions[1] + d.points[0].pointIndex[1];
           clickedcustomdata = d.points[0].data.customdata[vecindex];
           console.log(clickedcustomdata);
         });
       }"

X <- data.frame(x = c(1, 2, 1, 2, 1, 2), y = c(1, 1, 2, 2, 3, 3), z = 1:6, mydata = letters[1:6])
gg <- ggplot(X, aes(x = x, y = y, customdata = mydata)) + geom_tile(aes(fill = z))
fig <- ggplotly(gg) %>% onRender(js)
fig

This https://stackoverflow.com/a/11587049/9841389到达这里很有用。

尽管如此，我仍然鼓励您在 GitHub 上提交问题，以便官方修复此问题。