[英]Annotation / Text for ticklabels in R plotly polar chart
假設我有一個簡單的polar chart
:
R代碼 :
library(plotly)
p <- plot_ly(
type = 'scatterpolar',
r = c(0,1,2,4),
theta = c(0,45,90,120),
size = c(10, 20, 30, 40),
sizes = c(100, 300),
mode = 'markers'
) %>%
layout(
showlegend = FALSE,
polar = list(
angularaxis = list(
showticklabels = TRUE#,
#tickmode="array",
#tickvals = c(22.5, 67.5, 112, 157.5, 202, 247.5, 292, 337.5),
#ticktext = c('A', "B", "C", "D", "E", "F", "G", "H")
),
radialaxis = list(
tickmode="array",
tickvals = c(0, 1, 2, 3, 4, 5, 6, 7),
ticktext = c('', "One", "Two", "Three", "Four", "Five", "Six", "Seven")
)
)
)
ggplotly(p)
當我將showticklabels = FALSE
設置showticklabels = FALSE
,角度刻度標簽消失了,然后我想將A,B,C,D,E,F,G and H
為角度c(22.5, 67.5, 112, 157.5, 202, 247.5, 292, 337.5)
。
我無法使用ticktexts
和tickvals
得到以下預期的情節。 有人可以幫我解決問題,或者可以使用add_text
或add_annotation
嗎?
預期地塊 :
您可以使用showgrid = FALSE
完全刪除angularaxis
所有網格線,或者可以從0開始每22.5度有一條線,然后ticktext
將類似於以下c('', 'A', '', 'B', '', 'C', .......)
,或者您可以乏味地添加期望的行,然后刪除網格線,如下所示:
p <- plot_ly() %>%
# data points
add_trace(type = 'scatterpolar',
r = c(0,1,2,4),
theta = c(0,45,90,120),
size = c(10, 20, 30, 40),
sizes = c(100, 300),
mode = 'markers') %>%
# straight line from 0 dg to 180 dg
add_trace(type = 'scatterpolar',
r = c(0,4.3,4.3),
theta = c(0, 180, 360),
mode = 'lines',
line = list(color = 'grey', width = 1)) %>%
# straight line from 45 dg to 225 dg
add_trace(type = 'scatterpolar',
r = c(0,4.3,4.3),
theta = c(0, 45, 225),
mode = 'lines',
line = list(color = 'grey', width = 1)) %>%
# straight line from 90 dg to 270 dg
add_trace(type = 'scatterpolar',
r = c(0,4.3,4.3),
theta = c(0, 90, 270),
mode = 'lines',
line = list(color = 'grey', width = 1)) %>%
# straight line from 135 dg to 315 dg
add_trace(type = 'scatterpolar',
r = c(0,4.3,4.3),
theta = c(0, 135, 315),
mode = 'lines',
line = list(color = 'grey', width = 1)) %>%
# fill circle of radius 1
add_trace(type = 'scatterpolar',
mode = 'lines',
r = 1,
theta =seq(0, 360, 0.1),
line = list(color = 'grey'),
fill = 'toself',
fillcolor = 'grey',
opacity = 0.5) %>%
layout(
showlegend = FALSE,
polar = list(
angularaxis = list(
showticklabels = TRUE,
# remove grid lines and ticks
showgrid = FALSE,
ticks = '',
# if you want the axis to go the other way around
# direction = 'clockwise',
tickmode="array",
tickvals = seq(22.5, 337.5, 45),
ticktext = LETTERS[1:8]
),
radialaxis = list(
tickmode="array",
tickvals = c(0, 1, 2, 3, 4, 5, 6, 7),
ticktext = c('', "One", "Two", "Three", "Four", "Five", "Six", "Seven")
)
)
)
ggplotly(p)
輸出圖 :
我注意到那里的預期輸出會在代碼中以相反的方式列出字母。 如果這也是您要更改的字母順序,以匹配角度,例如c("A", "H", "G", "F", "E", "D", "C", "B")
(從A
倒序)
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