在R中的plotly直方图函数中自定义bin宽度

我有一个数据集，其中包含每天的日期和通话量。当我使用plotly R 包绘制它们时，除了其中 1 个之外，所有日期都将每个日期分隔到不同的容器中。然而，这一棘手的数据子集而是将数据分组为 2 天的间隔，这并不是非常有用的信息。我确信这是一个简单的修复，但我不太确定如何更改垃圾箱宽度。

a <- as.Date(c("2019-02-01", "2019-01-14", "2019-01-15", "2019-01-24", "2019-01-31", "2019-01-22","2019-01-14", "2019-01-25", "2019-02-06","2019-01-17", "2019-01-10", "2019-02-06","2019-01-15", "2019-01-17", "2019-01-28","2019-02-04", "2019-01-18","2019-01-15","2019-01-18", "2019-01-25", "2019-01-17","2019-01-30", "2019-01-25", "2019-01-23","2019-01-28", "2019-01-28", "2019-02-06","2019-02-04", "2019-01-24", "2019-01-30","2019-02-01", "2019-01-24", "2019-01-18","2019-01-22", "2019-02-06", "2019-01-17","2019-01-11", "2019-02-06", "2019-01-16","2019-01-31", "2019-02-04", "2019-01-23","2019-01-29", "2019-01-25", "2019-01-22","2019-02-05", "2019-02-01", "2019-01-28","2019-01-22", "2019-01-24", "2019-02-01","2019-01-23", "2019-01-30", "2019-02-05","2019-02-06", "2019-01-24", "2019-02-06","2019-01-30", "2019-01-28", "2019-01-16","2019-01-10", "2019-02-04", "2019-02-07","2019-02-01", "2019-02-04", "2019-01-17","2019-01-17", "2019-02-05", "2019-01-30","2019-02-04", "2019-02-01", "2019-02-01","2019-01-24", "2019-01-23", "2019-02-04","2019-02-04", "2019-01-23", "2019-02-04","2019-01-18", "2019-01-22", "2019-01-24","2019-01-17", "2019-01-22", "2019-02-06","2019-01-10", "2019-01-14", "2019-01-09","2019-02-05", "2019-01-11", "2019-01-17","2019-01-23", "2019-01-23", "2019-02-05","2019-01-11", "2019-02-04", "2019-01-28","2019-01-24", "2019-01-22", "2019-01-24","2019-01-18", "2019-01-31", "2019-02-04","2019-01-22", "2019-01-14", "2019-01-11","2019-01-11", "2019-01-28", "2019-02-01","2019-01-28", "2019-01-25", "2019-02-07","2019-01-24", "2019-02-06", "2019-01-15","2019-01-24", "2019-01-23", "2019-01-17","2019-01-24", "2019-01-24", "2019-01-23","2019-01-24", "2019-01-24", "2019-01-25","2019-01-24", "2019-01-24", "2019-01-28","2019-01-31" ,"2019-01-24", "2019-01-24","2019-01-22", "2019-01-24", "2019-01-17", "2019-01-24", "2019-01-22", "2019-01-23","2019-01-24", "2019-01-22", "2019-02-01","2019-01-14", "2019-01-23", "2019-01-30","2019-02-04", "2019-01-30", "2019-01-30","2019-02-04", "2019-02-04", "2019-01-30", "2019-01-30", "2019-01-30", "2019-01-30", "2019-01-29", "2019-01-31", "2019-01-25","2019-01-28" ,"2019-01-29")
plot_ly(x = a, type = "histogram") %>% layout( title = "Volume", xaxis = list(title = "Date"), yaxis = list(title = "Number of Calls"))

这是我使用的数据和代码的示例。我知道如何更改 ggplot2 和标准 hist() 函数中的 bin 宽度，但plotly 的交互式可视化是我在这里尝试捕获的内容。谢谢你！

根据 @MLavoie 的回应，我想用一个示例来回答这个问题，其他人在绘制两个重叠的直方图时可以轻松使用该示例。

要添加的重要直方图属性是nbinsx = 30如下所示。

# Add required packages
library(plotly)    

# Make some sample data
a = rnorm(1000,4)
b = rnorm(1000,6)

# Make your histogram plot with specified binsize set to 30 here
fig <- plot_ly(alpha = 0.6, nbinsx = 30)
fig <- fig %>% add_histogram(a, name = "first")
fig <- fig %>% add_histogram(b, name = "second")
fig <- fig %>% layout(barmode = "overlay", 
                      yaxis = list(title = "Frequency"),
                      xaxis = list(title = "Values"))

# Print your histogram 
fig

And here is the result of the code:

BONUS:

有时 y 轴上的对数刻度可能很有用。这可以通过对代码进行以下更改来完成：

# Add required packages
library(plotly)    

# Make some sample data
a = rnorm(1000,4)
b = rnorm(1000,6)

# Make your histogram plot with specified binsize set to 30 here
fig <- plot_ly(alpha = 0.6, nbinsx = 30)
fig <- fig %>% add_histogram(a, name = "first")
fig <- fig %>% add_histogram(b, name = "second")
fig <- fig %>% layout(barmode = "overlay", 
                      yaxis = list(title = "Frequency", type = "log"),
                      xaxis = list(title = "Values"))

# Print your histogram 
fig

这是带有对数刻度的代码的结果（在这种情况下并不是特别有用）：