[英]embed image: ggplot to plotly date issue
我正在嘗試使用ggplotly
將以下ggplot
圖像轉換為plotly
:
library(tidyverse)
library(ggimage)
library(plotly)
df <- data.frame(date =
as.Date(c("01/01/1998", "10/01/1998", "15/01/1998",
"25/01/1998", "01/02/1998", "12/02/1998", "20/02/1998"), "%d/%m/%Y"),
counts = c(12, 10, 2, 24, 15, 1, 14),
image = c(NA, "https://www.r-project.org/logo/Rlogo.png", NA, NA,
"https://www.r-project.org/logo/Rlogo.png", NA, NA))
df
# date counts image
# 1 1998-01-01 12 <NA>
# 2 1998-01-10 10 https://www.r-project.org/logo/Rlogo.png
# 3 1998-01-15 2 <NA>
# 4 1998-01-25 24 <NA>
# 5 1998-02-01 15 https://www.r-project.org/logo/Rlogo.png
# 6 1998-02-12 1 <NA>
# 7 1998-02-20 14 <NA>
gg <- ggplot(df, aes(date, counts)) +
geom_line() +
geom_image(aes(image = image), size = 0.05)
gg
我不能使用 ggplotly 直接轉換它,因為geom_image
沒有在plotly
中實現:
ggplotly(gg, height = 700, width = 900)
# In geom2trace.default(dots[[1L]][[1L]], dots[[2L]][[1L]], dots[[3L]][[1L]]) :
# geom_GeomImage() has yet to be implemented in plotly.
# If you'd like to see this geom implemented,
# Please open an issue with your example code at
# https://github.com/ropensci/plotly/issues
我認為您需要通過刪除geom_image
並在layout
中添加圖像來以不同的方式 go 關於它。 我不知道如何通過(即df$image
)引用圖像的位置。
即使手動進行,我也無法在圖表上獲得一張圖像:
gg2 <- ggplot(df, aes(date, counts)) +
geom_line()
ggplotly(gg2, height = 700, width = 900) %>%
layout(
images = list(
list(source = "https://www.r-project.org/logo/Rlogo.png",
xref = "paper", #https://plotly.com/r/reference/
yref = "paper",
x = .2, #as.Date(c("10/01/1998"), "%d/%m/%Y"),
y = .2,
sizex = 0.1,
sizey = 0.1,
opacity = 0.8
)))
該解決方案建議我需要以不同的日期格式工作,但我也無法讓它工作:
ggplotly(gg2, height = 700, width = 900) %>%
layout(
images = list(
list(source = "https://www.r-project.org/logo/Rlogo.png",
xref = "x", #or paper
yref = "y", #or paper
x = as.numeric(as.POSIXct("10/01/1998", format = "%d/%m/%Y")), #or .3
y = 10, #or .4
sizex = 0.1,
sizey = 0.1,
opacity = 0.8
)))
#or, reformat the x axis first
ggplotly(gg2, height = 700, width = 900) %>%
layout(xaxis = list(range =
c(as.numeric(as.POSIXct("01/01/1998", format="%d/%m/%Y"))*1000,
as.numeric(as.POSIXct("20/02/1998", format="%d/%m/%Y"))*1000),
type = "date"),
images = list(
list(source = "https://www.r-project.org/logo/Rlogo.png",
xref = "x",
yref = "y",
x = as.numeric(as.POSIXct("10/01/1998", format="%d/%m/%Y"))*1000,
y = 10,
sizex = 0.1,
sizey = 0.1,
opacity = 0.8
)))
#converting date from the outset using as.POSIXct doesn't help
#df$date <- as.numeric(as.POSIXct(df$date, format="%d/%m/%Y"))*1000
任何靈活的建議允許我參考我想要圖像的所有點?
謝謝
我不確定您的問題是日期問題,因為我無法使用layout.image
在 plot 上獲取圖像,即使我使用1:7
而不是日期,但我又不是 plotly 專家. 也就是說,我確信有幾種方法可以在不使用geom_image
的情況下獲取 plot 上的圖像,這是一種不太干凈的方法 - 並且對於大數據幀可能效率低下 - 但它適用於 plotly:
library(ggplot2)
library(png)
library(RCurl)
library(plotly)
mydf <- data.frame(date =
as.Date(c("01/01/1998", "10/01/1998", "15/01/1998",
"25/01/1998", "01/02/1998", "12/02/1998", "20/02/1998"), "%d/%m/%Y"),
counts = c(12, 10, 2, 24, 15, 1, 14),
image = c(NA, "https://www.r-project.org/logo/Rlogo.png", NA, NA,
"https://www.r-project.org/logo/Rlogo.png", NA, NA))
mydf
# You should find some way to compute your desired image height and image width
yHeight <- (max(mydf$counts) - min(mydf$counts)) * 0.05
xWidth <- (max(as.numeric(mydf$date)) - min(as.numeric(mydf$date))) * 0.05
# create the base plot
gg2 <- ggplot(mydf, aes(date, counts)) +
geom_line()
# for each row in the df
for (x in 1:nrow(mydf)) {
row <- mydf[x, ]
if(!is.na(row$image)){
# read the image
img <- readPNG(getURLContent(row$image))
# add the image with annotation_raster
gg2 <- gg2 + annotation_raster(img,
xmin = as.numeric(row$date) - xWidth/2,
xmax = as.numeric(row$date) + xWidth/2,
ymin = row$counts - yHeight/2,
ymax = row$counts + yHeight/2)
}
}
ggplotly(gg2)
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.